ETSI-ITS-DSRC.md

NOTE: In the absence of additional requirements defined in a standard using this data element, the follow guidelines shall be used.
>>>

```asn1
MsgCount ::= INTEGER (0..127)
```

### <a name="Offset-B09"></a>Offset-B09
A 9-bit delta offset in X, Y or Z direction from some known point. For non-vehicle centric coordinate frames of
 reference, offset is positive to the East (X) and to the North (Y) directions. The most negative value shall be used to
 indicate an unknown value.
 a range of +- 2.55 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B09 ::= INTEGER (-256..255)
```

### <a name="Offset-B10"></a>Offset-B10
A 10-bit delta offset in X, Y or Z direction from some known point. For non-vehicle centric coordinate frames of
 reference, offset is positive to the East (X) and to the North (Y) directions. The most negative value shall be used to
 indicate an unknown value.
 a range of +- 5.11 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B10 ::= INTEGER (-512..511)
```

### <a name="Offset-B11"></a>Offset-B11
An 11-bit delta offset in X or Y direction from some known point. For non-vehicle centric coordinate frames of
 reference, offset is positive to the East (X) and to the North (Y) directions. The most negative value shall be used to
 indicate an unknown value.
 a range of +- 10.23 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B11 ::= INTEGER (-1024..1023)
```

### <a name="Offset-B12"></a>Offset-B12
A 12-bit delta offset in X, Y or Z direction from some known point. For non-vehicle centric coordinate frames of
 reference, non-vehicle centric coordinate frames of reference, offset is positive to the East (X) and to the North (Y)
 directions. The most negative value shall be used to indicate an unknown value.
 a range of +- 20.47 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B12 ::= INTEGER (-2048..2047)
```

### <a name="Offset-B13"></a>Offset-B13
A 13-bit delta offset in X or Y direction from some known point. For non-vehicle centric coordinate frames of
 reference, offset is positive to the East (X) and to the North (Y) directions. The most negative value shall be used to
 indicate an unknown value.
 a range of +- 40.95 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B13 ::= INTEGER (-4096..4095)
```

### <a name="Offset-B14"></a>Offset-B14
A 14-bit delta offset in X or Y direction from some known point. For non-vehicle centric coordinate frames of
 reference, offset is positive to the East (X) and to the North (Y) directions.
 a range of +- 81.91 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B14 ::= INTEGER (-8192..8191)
```

### <a name="Offset-B16"></a>Offset-B16
A 16-bit delta offset in X, Y or Z direction from some known point. For non-vehicle centric coordinate frames of
 reference, offset is positive to the East (X) and to the North (Y) directions. The most negative value shall be used to
 indicate an unknown value.
 a range of +- 327.68 meters

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Offset-B16 ::= INTEGER (-32768..32767)
```

### <a name="PedestrianBicycleDetect"></a>PedestrianBicycleDetect
This DE is used to provide an indication of whether Pedestrians and/or Bicyclists have been detected in the crossing lane.
 true if ANY Pedestrians or Bicyclists are detected crossing the target lane or lanes

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
PedestrianBicycleDetect ::= BOOLEAN
```

### <a name="PositionConfidence"></a>PositionConfidence
This DE entry is used to provide the 95% confidence level for the currently reported value of
 entries such as the DE_Position entries, taking into account the current calibration and precision of the sensor(s) used to
 measure and/or calculate the value. It is used in the horizontal plane. This data element is only to provide the listener with
 information on the limitations of the sensing system; not to support any type of automatic error correction or to imply a
 guaranteed maximum error. This data element should not be used for fault detection or diagnosis, but if a vehicle is able
 to detect a fault, the confidence interval should be increased accordingly. The frame of reference and axis of rotation used
 shall be accordance with that defined in Section 11 of this standard.

 - `unavailable` - 0: B'0000 Not Equipped or unavailable
 - `a500m`       - 1: B'0001 500m or about 5 * 10 ^ -3 decimal degrees
 - `a200m`       - 2: B'0010 200m or about 2 * 10 ^ -3 decimal degrees
 - `a100m`       - 3: B'0011 100m or about 1 * 10 ^ -3 decimal degrees
 - `a50m`        - 4: B'0100 50m or about 5 * 10 ^ -4 decimal degrees
 - `a20m`        - 5: B'0101 20m or about 2 * 10 ^ -4 decimal degrees
 - `a10m`        - 6: B'0110 10m or about 1 * 10 ^ -4 decimal degrees
 - `a5m`         - 7: B'0111 5m or about 5 * 10 ^ -5 decimal degrees
 - `a2m`         - 8: B'1000 2m or about 2 * 10 ^ -5 decimal degrees
 - `a1m`         - 9: B'1001 1m or about 1 * 10 ^ -5 decimal degrees
 - `a50cm`       - 10: B'1010 0.50m or about 5 * 10 ^ -6 decimal degrees
 - `a20cm`       - 11: B'1011 0.20m or about 2 * 10 ^ -6 decimal degrees
 - `a10cm`       - 12: B'1100 0.10m or about 1 * 10 ^ -6 decimal degrees
 - `a5cm`        - 13: B'1101 0.05m or about 5 * 10 ^ -7 decimal degrees
 - `a2cm`        - 14: B'1110 0.02m or about 2 * 10 ^ -7 decimal degrees
 - `a1cm`        - 15) B'1111 0.01m or about 1 * 10 ^ -7 decimal degrees
 - Encoded as a 4 bit value

Values:
* **unavailable** (0)<br>
* **a500m** (1)<br>
* **a200m** (2)<br>
* **a100m** (3)<br>
* **a50m** (4)<br>
* **a20m** (5)<br>
* **a10m** (6)<br>
* **a5m** (7)<br>
* **a2m** (8)<br>
* **a1m** (9)<br>
* **a50cm** (10)<br>
* **a20cm** (11)<br>
* **a10cm** (12)<br>
* **a5cm** (13)<br>
* **a2cm** (14)<br>
* **a1cm** (15)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
PositionConfidence ::= ENUMERATED {
   unavailable (0),
   a500m   (1),
   a200m   (2),
   a100m   (3),
   a50m    (4),
   a20m    (5),
   a10m    (6),
   a5m     (7),
   a2m     (8),
   a1m     (9),
   a50cm  (10),
   a20cm  (11),
   a10cm  (12),
   a5cm   (13),
   a2cm   (14),
   a1cm   (15)
 }
```

### <a name="PrioritizationResponseStatus"></a>PrioritizationResponseStatus
This DE is used in the [**PrioritizationResponse**](#PrioritizationResponse) data frame to indicate the
 general status of a prior prioritization request.

 - `unknown`           - 0: Unknown state
 - `requested`         - 1: This prioritization request was detected by the traffic controller
 - `processing`        - 2: Checking request (request is in queue, other requests are prior)
 - `watchOtherTraffic` - 3: Cannot give full permission, therefore watch for other traffic. Note that other requests may be present
 - `granted`           - 4: Intervention was successful and now prioritization is active
 - `rejected`          - 5: The prioritization or preemption request was rejected by the traffic controller
 - `maxPresence`       - 6: The Request has exceeded maxPresence time. Used when the controller has determined that the requester should then back off and request an alternative.
 - `reserviceLocked`   - 7: Prior conditions have resulted in a reservice
                            locked event: the controller requires the passage of time before another similar request will be accepted

Values:
* **unknown** (0)<br>
* **requested** (1)<br>
* **processing** (2)<br>
* **watchOtherTraffic** (3)<br>
* **granted** (4)<br>
* **rejected** (5)<br>
* **maxPresence** (6)<br>
* **reserviceLocked** (7)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
PrioritizationResponseStatus ::= ENUMERATED {
  unknown           (0),
  requested         (1),
  processing        (2),
  watchOtherTraffic (3),
  granted           (4),
  rejected          (5),
  maxPresence       (6),
  reserviceLocked   (7),
  ...
}
```

### <a name="PriorityLevel"></a>PriorityLevel
This DE is used to provide the R09 priority.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V2.2.1_
```asn1
PriorityLevel ::= INTEGER (0..255)
```

### <a name="PriorityRequestType"></a>PriorityRequestType
This DE provides a means to indicate if a request (found in the Signal RequestMessage) represents
 a new service request, a request update, or a request cancellation for either preemption or priority services.

Values:
* **priorityRequestTypeReserved** (0)<br>
* **priorityRequest** (1)<br>
* **priorityRequestUpdate** (2)<br>
* **priorityCancellation** (3)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
PriorityRequestType ::= ENUMERATED {
  priorityRequestTypeReserved (0),
  priorityRequest             (1),
  priorityRequestUpdate       (2),
  priorityCancellation        (3),
  ...
}
```

### <a name="RegionId"></a>RegionId
This DE is used to define regions where unique additional content may be added and
 used in the message set. The index values defined below represent various regions known at the time of publication. This
 list is expected to grow over time. The index values assigned here can be augmented by local (uncoordinated)
 assignments in the allowed range. It should be noted that such a local value is specified in the "REGION" ASN module, so
 there is no need to edit the DSRC ASN specification of the standard. This process is further described in Section 11.1.

 - `noRegion` - 0: Use default supplied stubs
 - `addGrpA`  - 1: USA
 - `addGrpB`  - 2: Japan
 - `addGrpC`  - 3: EU

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_

>>>
NOTE:&emsp;new registered regional IDs will be added here
        The values 128 and above are for local region use
>>>

```asn1
RegionId ::= INTEGER (0..255)
  noRegion     RegionId ::= 0
  addGrpA      RegionId ::= 1
  addGrpB      RegionId ::= 2
  addGrpC      RegionId ::= 3
```

### <a name="ReportingPoint"></a>ReportingPoint
This DE is used to provide the R09 reporting point.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V2.2.1_
```asn1
ReportingPoint ::= INTEGER (0..65535)
```

### <a name="RequestID"></a>RequestID
This DE is used to provide a unique ID between two parties for various dialog exchanges.
 Combined with the sender's VehicleID (consisting of a TempID or a Station ID), this provides a unique string for some
 mutually defined period of time. A typical example of use would be a signal preemption or priority request dialog
 containing multiple requests from one sender (denoted by the unique RequestID with each). When such a request is
 processed and reflected in the signal status messages, the original sender and the specific request can both be determined.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_

>>>
NOTE:&emsp;In typical use, this value is simply incremented in a modulo fashion to ensure a unique stream of values for the
        device creating it. Any needs for uniqueness across multiple dialogs to one or more parties shall be the responsibility of
        the device to manage. There are often normative restrictions on the device changing its TempID during various dialogs
        when this data element is used. Further details of these operational concepts can be found in the relevant standards.
>>>

```asn1
RequestID ::= INTEGER (0..255)
```

### <a name="RequestImportanceLevel"></a>RequestImportanceLevel
This DE is used to state what type of signal request is being made to a signal
 controller by a DSRC device in a defined role (such as a police vehicle). The levels of the request typically convey a
 sense of urgency or importance with respect to other demands to allow the controller to use predefined business rules to
 determine how to respond. These rules will vary in terms of how details of overall importance and urgency are to be
 ranked, so they are to be implemented locally. As a result of this regional process, the list below should be assigned well-
 defined meanings by the local deployment. These meaning will typically result in assigning a set of values to list for each
 vehicle role type that is to be supported.

 - `requestImportanceLevel1`     1: The least important request
 - `requestImportanceLevel14`   14: The most important request
 - `requestImportanceReserved`  15: Reserved for future use

Values:
* **requestImportanceLevelUnKnown** (0)<br>
* **requestImportanceLevel1** (1)<br>
* **requestImportanceLevel2** (2)<br>
* **requestImportanceLevel3** (3)<br>
* **requestImportanceLevel4** (4)<br>
* **requestImportanceLevel5** (5)<br>
* **requestImportanceLevel6** (6)<br>
* **requestImportanceLevel7** (7)<br>
* **requestImportanceLevel8** (8)<br>
* **requestImportanceLevel9** (9)<br>
* **requestImportanceLevel10** (10)<br>
* **requestImportanceLevel11** (11)<br>
* **requestImportanceLevel12** (12)<br>
* **requestImportanceLevel13** (13)<br>
* **requestImportanceLevel14** (14)<br>
* **requestImportanceReserved** (15)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RequestImportanceLevel ::= ENUMERATED {
  requestImportanceLevelUnKnown  (0),
  requestImportanceLevel1        (1),
  requestImportanceLevel2        (2),
  requestImportanceLevel3        (3),
  requestImportanceLevel4        (4),
  requestImportanceLevel5        (5),
  requestImportanceLevel6        (6),
  requestImportanceLevel7        (7),
  requestImportanceLevel8        (8),
  requestImportanceLevel9        (9),
  requestImportanceLevel10      (10),
  requestImportanceLevel11      (11),
  requestImportanceLevel12      (12),
  requestImportanceLevel13      (13),
  requestImportanceLevel14      (14),
  requestImportanceReserved     (15)
}
```

### <a name="RequestSubRole"></a>RequestSubRole
This DE is used to further define the details of the role which any DSRC device might
 play when making a request to a signal controller. This value is not always needed. For example, perhaps in a
 deployment all police vehicles are to be treated equally. The taxonomy of what details are selected to be entered into the
 list is a regional choice but should be devised to allow the controller to use predefined business rules to respond using the
 data. As another example, perhaps in a regional deployment a cross-city express type of transit vehicle is given a different
 service response for the same request than another type of transit vehicle making an otherwise similar request. As a
 result of this regional process, the list below should be assigned well-defined meanings by the local deployment. These
 meanings will typically result in assigning a set of values to list for each vehicle role type that is to be supported.

 - `requestSubRole1`        - 1:  The first type of sub role
 - `requestSubRole14`       - 14: The last type of sub role
 - `requestSubRoleReserved` - 15: Reserved for future use

Values:
* **requestSubRoleUnKnown** (0)<br>
* **requestSubRole1** (1)<br>
* **requestSubRole2** (2)<br>
* **requestSubRole3** (3)<br>
* **requestSubRole4** (4)<br>
* **requestSubRole5** (5)<br>
* **requestSubRole6** (6)<br>
* **requestSubRole7** (7)<br>
* **requestSubRole8** (8)<br>
* **requestSubRole9** (9)<br>
* **requestSubRole10** (10)<br>
* **requestSubRole11** (11)<br>
* **requestSubRole12** (12)<br>
* **requestSubRole13** (13)<br>
* **requestSubRole14** (14)<br>
* **requestSubRoleReserved** (15)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RequestSubRole ::= ENUMERATED {
  requestSubRoleUnKnown    (0),
  requestSubRole1          (1),
  requestSubRole2          (2),
  requestSubRole3          (3),
  requestSubRole4          (4),
  requestSubRole5          (5),
  requestSubRole6          (6),
  requestSubRole7          (7),
  requestSubRole8          (8),
  requestSubRole9          (9),
  requestSubRole10        (10),
  requestSubRole11        (11),
  requestSubRole12        (12),
  requestSubRole13        (13),
  requestSubRole14        (14),
  requestSubRoleReserved  (15)
}
```

### <a name="RestrictionAppliesTo"></a>RestrictionAppliesTo
The RestrictionAppliesTo data element provides a short list of common vehicle types which may have one or more
 special movements at an intersection. In general, these movements are not visible to other traffic with signal heads, but
 the SPAT data reflects the state of the movement. Various restricted movements at an intersection can be expressed
 using this element to indicate where the movement applies.

 - `none` :              applies to nothing
 - `equippedTransit`:    buses etc.
 - `equippedTaxis`:
 - `equippedOther`:      other vehicle types with necessary signal phase state reception equipment
 - `emissionCompliant`:  regional variants with more definitive items also exist
 - `equippedBicycle`:
 - `weightCompliant`:
 - `heightCompliant`:    Items dealing with traveler needs serviced by the infrastructure. These end users (which are not vehicles) are presumed to be suitably equipped
 - `pedestrians`:
 - `slowMovingPersons`:
 - `wheelchairUsers`:
 - `visualDisabilities`:
 - `audioDisabilities`:  hearing

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RestrictionAppliesTo ::= ENUMERATED {
  none,
  equippedTransit,
  equippedTaxis,
  equippedOther,
  emissionCompliant,
  equippedBicycle,
  weightCompliant,
  heightCompliant,
  pedestrians,
  slowMovingPersons,
  wheelchairUsers,
  visualDisabilities,
  audioDisabilities,
  otherUnknownDisabilities,
  ...
}
```

### <a name="RestrictionClassID"></a>RestrictionClassID
This DE defines an intersection-unique value to convey data about classes of users.
 The mapping used varies with each intersection and is defined in the MAP message if needed. The defined mappings
 found there are used to determine when a given class is meant. The typical use of this element is to map additional
 movement restrictions or rights (in both the MAP and SPAT messages) to special classes of users (trucks, high sided
 vehicles, special vehicles etc.). There is the general presumption that in the absence of this data, any allowed movement
 extends to all users.

 An index value to identify data about classes of users the value used varies with each intersection's
 needs and is defined in the map to the assigned classes of supported users.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RestrictionClassID ::= INTEGER (0..255)
```

### <a name="RoadRegulatorID"></a>RoadRegulatorID
This DE is a 16-bit globally unique identifier assigned to an entity responsible for assigning
 Intersection IDs in the region over which it has such authority. The value zero shall be used for testing, and should only be
 used in the absence of a suitable assignment. A single entity which assigns intersection IDs may be assigned several
 RoadRegulatorIDs. These assignments are presumed to be permanent.

 The value zero shall be used for testing only

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RoadRegulatorID ::= INTEGER (0..65535)
```

### <a name="RoadSegmentID"></a>RoadSegmentID
This DE is used to uniquely define a section of roadway within a country or region in a 16-bit field.
 Assignment rules for this value are established elsewhere and may use regional assignment schemas that vary. Within
 the region the policies used to ensure an assigned value’s uniqueness before that value is reused is the responsibility of
 that region. Such reuse is expected to occur, but over somewhat lengthy epoch (months).

 The values zero to 255 shall be used for testing only
 Note that the value assigned to an RoadSegment will be
 unique within a given regional ID only during its use

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RoadSegmentID ::= INTEGER (0..65535)
```

### <a name="RoadwayCrownAngle"></a>RoadwayCrownAngle
The RoadwayCrownAngle data element relates the gross tangential angle of the roadway surface with respect to
 the local horizontal axis and is measured at the indicated part of the lane. This measurement is typically made at the
 crown (centerline) or at an edge of the lane path. Its typical use is to relate data used in speed warning and traction
 calculations for the lane segment or roadway segment in which the measurement is taken.

 - The value -128 shall be used for unknown
 - The value zero shall be used for angles which are between -0.15 and +0.15

&nbsp;&nbsp;&nbsp;&nbsp;**Unit:** _0.3 degrees of angle over a range of -38.1 to + 38.1 degrees_

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RoadwayCrownAngle ::= INTEGER (-128..127)
```

### <a name="RouteNumber"></a>RouteNumber
This DE is used to provide the R09 route information.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V2.2.1_
```asn1
RouteNumber ::= INTEGER (0..4294967295)
```

### <a name="RTCMmessage"></a>RTCMmessage
This DE contains the stream of octets of the actual RTCM message that is being sent.
 The message’s contents are defined in RTCM Standard 10403.1 and in RTCM Standard 10402.1 and its successors.
 Note that most RTCM messages are considerably smaller than the size limit defined here, but that some messages may
 need to be broken into smaller messages (as per the rules defined in the RTCM work) in order to be transmitted over DSRC.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
RTCMmessage ::= OCTET STRING (SIZE(1..1023))
```

### <a name="RTCM-Revision"></a>RTCM-Revision
This DE provides the specific revision of the RTCM standard which is being used. This is
 helpful to know precisely the mapping of the message types to their definitions, as well as some minor transport layer
 ordering details when received in the mobile unit. All RTCM SC-104 messages follow a common message numbering
 method (wherein all defined messages are given unique values) which can be decoded from the initial octets of the
 message. This operation is typically performed by the GNSS rover that consumes the messages, so it is transparent at
 the DSRC message set level.

 Values:
 - `rtcmRev2`:  Std 10402.x et al
 - `rtcmRev3`:  Std 10403.x et al

Values:
* **unknown** (0)<br>
* **rtcmRev2** (1)<br>
* **rtcmRev3** (2)<br>
* **reserved** (3)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_

>>>
NOTE:&emsp;In order to fully support the use of networked transport of RTCM corrections (so-called Ntrip systems), the
         enumerated list of protocol types provides for all the common types outlined in RTCM Standard 10410.0, Appendix B. It is
         anticipated that revisions 3.x and 2.3 will predominate in practice as they do today. It should also be noted that RTCM
         standards use the term `byte` for an 8-bit value, while in this standard the term `octet` is used.
>>>

```asn1
RTCM-Revision ::= ENUMERATED {
  unknown  (0),
  rtcmRev2 (1),
  rtcmRev3 (2),
  reserved (3),
  ...
}
```

### <a name="Scale-B12"></a>Scale-B12
A 12-bit signed scaling factor supporting scales from zero (which is not used) to >200%. In this data element, the
 value zero is taken to represent a value of one (scale 1:1). Values above and below this add or remove exactly 0.05%
 from the initial value of 100%. Hence, a value of 2047 adds 102.35% to 100%, resulting in a scale of 202.35% exactly (the
 largest valid scale value). Negative values which would result in an effective final value below zero are not supported. The
 smallest valid value allowed is -1999 and the remaining negative values are reserved for future definition.

&nbsp;&nbsp;&nbsp;&nbsp;**Unit:** _in steps of 0.05 percent_

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
Scale-B12 ::= INTEGER (-2048..2047)
```

### <a name="SignalGroupID"></a>SignalGroupID
This DE is an index used to map between the internal state machine of one or more signal controllers (or
 other types of traffic flow devices) and a common numbering system that can represent all possible combinations of active
 states (movements and phases in US traffic terminology). All possible movement variations are assigned a unique value
 within the intersection. Conceptually, the ID represents a means to provide a list of lanes in a set which would otherwise
 need to be enumerated in the message. The values zero and 255 are reserved, so there may up to 254 different signal
 group IDs within one single intersection. The value 255 represents a protected-Movement-Allowed or permissive-
 Movement-Allowed condition that exists at all times. This value is applied to lanes, with or without traffic control devices,
 that operate as free-flow lanes. Typically referred to as Channelized Right/Left Turn Lanes (in right/left-hand drive
 countries).

 Values:
 - the value `0` shall be used when the ID is not available or not known
 - the value `255` is reserved to indicate a permanent green movement state
 - therefore a simple 8 phase signal controller device might use 1..9 as its groupIDs

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SignalGroupID ::= INTEGER (0..255)
```

### <a name="SegmentAttributeXY"></a>SegmentAttributeXY
This DE is an enumerated list of attributes about the current lane segment which
 may be enabled or disabled to indicate the presence or absence of the selected attribute on the segment. A segment is
 one or more of the straight lines formed between each set of node points. It is common for a segment attribute to persist
 for more than one set of node points if there is any curvature in the lane itself. The described attributes are all binary flags
 in that they do not need to convey any additional data. Other attributes allow sending short data values to reflect a setting
 which is set and persists in a similar fashion.

 Various values which can be Enabled and Disabled for a lane segment
 - reserved:
 - doNotBlock: segment where a vehicle may not come to a stop
 - whiteLine:  segment where lane crossing not allowed such as the final few meters of a lane 
 - mergingLaneLeft: indicates porous lanes
 - mergingLaneRight: indicates porous lanes
 - curbOnLeft: indicates presence of curbs
 - curbOnRight: indicates presence of curbs
 - loadingzoneOnLeft:  loading or drop off zones
 - loadingzoneOnRight: loading or drop off zones
 - turnOutPointOnLeft: opening to adjacent street/alley/road
 - turnOutPointOnRight: opening to adjacent street/alley/road
 - adjacentParkingOnLeft: side of road parking
 - adjacentParkingOnRight: side of road parking
 - adjacentBikeLaneOnLeft: presence of marked bike lanes
 - adjacentBikeLaneOnRight: presence of marked bike lanes
 - sharedBikeLane: right of way is shared with bikes who may occupy entire lane width
 - bikeBoxInFront:
 - transitStopOnLeft: any form of bus/transit loading, with pull in-out access to lane on left
 - transitStopOnRight: any form of bus/transit loading, with pull in-out access to lane on right
 - transitStopInLane: any form of bus/transit loading, in mid path of the lane
 - sharedWithTrackedVehicle: lane is shared with train or trolley, not used for crossing tracks 
 - safeIsland: begin/end a safety island in path
 - lowCurbsPresent: for ADA support
 - rumbleStripPresent: for ADA support
 - audibleSignalingPresent: for ADA support
 - adaptiveTimingPresent: for ADA support
 - rfSignalRequestPresent: Supports RF push to walk technologies
 - partialCurbIntrusion: path is blocked by a median or curb but at least 1 meter remains open for use
                         and at-grade passage Lane geometry details
 - taperToLeft: Used to control final path shape (see standard for defined shapes)
 - taperToRight: Used to control final path shape (see standard for defined shapes)
 - taperToCenterLine: Used to control final path shape (see standard for defined shapes)
 - parallelParking: Parking at an angle with the street
 - headInParking:   Parking at an angle with the street
 - freeParking:     No restriction on use of parking
 - timeRestrictionsOnParking: Parking is not permitted at all times
                              typically used when the 'parking' lane becomes a driving lane at times
 - costToPark: Used where parking has a cost
 - midBlockCurbPresent: a protruding curb near lane edge
 - unEvenPavementPresent: a disjoint height at lane edge

Values:
* **reserved** <br>
* **doNotBlock** <br>
* **whiteLine** <br>
* **mergingLaneLeft** <br>
* **mergingLaneRight** <br>
* **curbOnLeft** <br>
* **curbOnRight** <br>
* **loadingzoneOnLeft** <br>
* **loadingzoneOnRight** <br>
* **turnOutPointOnLeft** <br>
* **turnOutPointOnRight** <br>
* **adjacentParkingOnLeft** <br>
* **adjacentParkingOnRight** <br>
* **adjacentBikeLaneOnLeft** <br>
* **adjacentBikeLaneOnRight** <br>
* **sharedBikeLane** <br>
* **bikeBoxInFront** <br>
* **transitStopOnLeft** <br>
* **transitStopOnRight** <br>
* **transitStopInLane** <br>
* **sharedWithTrackedVehicle** <br>
* **safeIsland** <br>
* **lowCurbsPresent** <br>
* **rumbleStripPresent** <br>
* **audibleSignalingPresent** <br>
* **adaptiveTimingPresent** <br>
* **rfSignalRequestPresent** <br>
* **partialCurbIntrusion** <br>
* **taperToLeft** <br>
* **taperToRight** <br>
* **taperToCenterLine** <br>
* **parallelParking** <br>
* **headInParking** <br>
* **freeParking** <br>
* **timeRestrictionsOnParking** <br>
* **costToPark** <br>
* **midBlockCurbPresent** <br>
* **unEvenPavementPresent** <br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SegmentAttributeXY ::= ENUMERATED {
  reserved                  ,
  doNotBlock                ,
  whiteLine                 ,
  mergingLaneLeft           ,
  mergingLaneRight          ,
  curbOnLeft                ,
  curbOnRight               ,
  loadingzoneOnLeft         ,
  loadingzoneOnRight        ,
  turnOutPointOnLeft        ,
  turnOutPointOnRight       ,
  adjacentParkingOnLeft     ,
  adjacentParkingOnRight    ,
  adjacentBikeLaneOnLeft    ,
  adjacentBikeLaneOnRight   ,
  sharedBikeLane            ,
  bikeBoxInFront            ,
  transitStopOnLeft         ,
  transitStopOnRight        ,
  transitStopInLane         ,
  sharedWithTrackedVehicle  ,
  safeIsland                ,
  lowCurbsPresent           ,
  rumbleStripPresent        ,
  audibleSignalingPresent   ,
  adaptiveTimingPresent     ,
  rfSignalRequestPresent    ,
  partialCurbIntrusion      ,
  taperToLeft               ,
  taperToRight              ,
  taperToCenterLine         ,
  parallelParking           ,
  headInParking             ,
  freeParking               ,
  timeRestrictionsOnParking ,
  costToPark                ,
  midBlockCurbPresent       ,
  unEvenPavementPresent     ,
  ...
}
```

### <a name="SemiMajorAxisAccuracy"></a>SemiMajorAxisAccuracy
This DE is used to express the radius (length) of the semi-major axis of an
 ellipsoid representing the accuracy which can be expected from a GNSS system in 5cm steps,
 typically at a one sigma level of confidence.

 Value is semi-major axis accuracy at one standard dev.
 - Range 0-12.7 meter, LSB = .05m
 - 254 = any value equal or greater than 12.70 meter
 - 255 = unavailable semi-major axis value

&nbsp;&nbsp;&nbsp;&nbsp;**Unit:** _0.05m_

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SemiMajorAxisAccuracy ::= INTEGER (0..255)
```

### <a name="SemiMajorAxisOrientation"></a>SemiMajorAxisOrientation
This DE is used to orientate the angle of the semi-major axis of an
 ellipsoid representing the accuracy which can be expected from a GNSS system with respect to the coordinate system.

 Value is orientation of semi-major axis
 - relative to true north (0-359.9945078786 degrees)
 - LSB units of 360/65535 deg = 0.0054932479
 - a value of 0 shall be 0 degrees
 - a value of 1 shall be 0.0054932479 degrees
 - a value of 65534 shall be 359.9945078786 deg
 - a value of 65535 shall be used for orientation unavailable

&nbsp;&nbsp;&nbsp;&nbsp;**Unit:** _360/65535 degree_

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SemiMajorAxisOrientation ::= INTEGER (0..65535)
```

### <a name="SemiMinorAxisAccuracy"></a>SemiMinorAxisAccuracy
This DE is used to express the radius of the semi-minor axis of an ellipsoid
 representing the accuracy which can be expected from a GNSS system in 5cm steps, typically at a one sigma level of
 confidence.

 Value is semi-minor axis accuracy at one standard dev
 - range 0-12.7 meter, LSB = .05m
 - 254 = any value equal or greater than 12.70 meter
 - 255 = unavailable semi-minor axis value

&nbsp;&nbsp;&nbsp;&nbsp;**Unit:** _0.05m_

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SemiMinorAxisAccuracy ::= INTEGER (0..255)
```

### <a name="SpeedAdvice"></a>SpeedAdvice
This data element represents the recommended velocity of an object, typically a vehicle speed along a roadway,
 expressed in unsigned units of 0.1 meters per second.

 - LSB units are 0.1 m/s
 - the value 499 shall be used for values at or greater than 49.9 m/s
 - the value 500 shall be used to indicate that speed is unavailable

&nbsp;&nbsp;&nbsp;&nbsp;**Unit:** _0.1 m/s_

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SpeedAdvice ::= INTEGER (0..500)
```

### <a name="SpeedConfidenceDSRC"></a>SpeedConfidenceDSRC
This DE is used to provide the 95% confidence level for the currently reported
 value of [**Speed**](#Speed), taking into account the current calibration and precision of the sensor(s) used to measure and/or
 calculate the value. This data element is only to provide the listener with information on the limitations of the sensing
 system, not to support any type of automatic error correction or to imply a guaranteed maximum error. This data element
 should not be used for fault detection or diagnosis, but if a vehicle is able to detect a fault, the confidence interval should
 be increased accordingly.

 - 0 - `unavailable` : Not Equipped or unavailable
 - 1 - `prec100ms`   : 100  meters / sec
 - 2 - `prec10ms`    : 10   meters / sec
 - 3 - `prec5ms`     : 5    meters / sec
 - 4 - `prec1ms`     : 1    meters / sec
 - 5 - `prec0-1ms`   : 0.1  meters / sec
 - 6 - `prec0-05ms`  : 0.05 meters / sec
 - 7 - `prec0-01ms`  : 0.01 meters / sec

Values:
* **unavailable** (0)<br>
* **prec100ms** (1)<br>
* **prec10ms** (2)<br>
* **prec5ms** (3)<br>
* **prec1ms** (4)<br>
* **prec0-1ms** (5)<br>
* **prec0-05ms** (6)<br>
* **prec0-01ms** (7)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
SpeedConfidenceDSRC ::= ENUMERATED {
   unavailable (0),
   prec100ms   (1),
   prec10ms    (2),
   prec5ms     (3),
   prec1ms     (4),
   prec0-1ms   (5),
   prec0-05ms  (6),
   prec0-01ms  (7)
 }
```

### <a name="TemporaryID"></a>TemporaryID
This is the 4 octet random device identifier, called the TemporaryID. When used for a mobile OBU device, this value
 will change periodically to ensure the overall anonymity of the vehicle, unlike a typical wireless or wired 802 device ID.
 Because this value is used as a means to identify the local vehicles that are interacting during an encounter, it is used in
 the message set. Other devices, such as infrastructure (RSUs), may have a fixed value for the temporary ID value. See
 also [**StationId**](#StationId) which is used in other deployment regions.

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_

>>>
NOTE:&emsp;The circumstances and times at which various DSRC devices (notably OBUs) create and change their current
        Temporary ID is a complex application level topic. It should be noted that the Temporary ID is not the same as a device
        MAC value, although when used as a means to uniquely identify a device, both have many common properties. It should
        further be noted that the MAC value for a mobile OBU device (unlike a typical wireless or wired 802 device) will
        periodically change to a new random value to ensure the overall anonymity of the vehicle.
>>>

```asn1
TemporaryID ::= OCTET STRING (SIZE(4))
```

### <a name="ThrottleConfidence"></a>ThrottleConfidence
This DE is used to provide the 95% confidence level for the currently reported
 value of DE [**Throttle**](#Throttle), taking into account the current calibration and precision of the sensor(s) used to measure and/or
 calculate the value. This data element is only to provide information on the limitations of the sensing system, not to
 support any type of automatic error correction or to imply a guaranteed maximum error. This data element should not be
 used for fault detection or diagnosis, but if a vehicle is able to detect a fault, the confidence interval should be increased
 accordingly. If a fault that triggers the MIL is of a nature to render throttle performance unreliable, then ThrottleConfidence
 should be represented as "notEquipped."

 - 0 - `unavailable`:    B'00 Not Equipped or unavailable
 - 1 - `prec10percent`:  B'01 10 percent Confidence level
 - 2 - `prec1percent`:   B'10 1 percent Confidence level
 - 3 - `prec0-5percent`: B'11 0.5 percent Confidence level

Values:
* **unavailable** (0)<br>
* **prec10percent** (1)<br>
* **prec1percent** (2)<br>
* **prec0-5percent** (3)<br>

&nbsp;&nbsp;&nbsp;&nbsp;**Categories:** Infrastructure information 

&nbsp;&nbsp;&nbsp;&nbsp;**Revision:** _V1.3.1_
```asn1
ThrottleConfidence ::= ENUMERATED {
   unavailable     (0),
   prec10percent   (1),
   prec1percent    (2),
   prec0-5percent  (3)
 }
```

### <a name="TimeConfidence"></a>TimeConfidence
This DE is used to provide the 95% confidence level for the currently reported value
 of time, taking into account the current calibration and precision of the sensor(s) used to measure and/or calculate the
 value. This data element is only to provide information on the limitations of the sensing system, not to support any type of
 automatic error correction or to imply a guaranteed maximum error. This data element should not be used for fault
 detection or diagnosis, but if a vehicle is able to detect a fault, the confidence interval should be increased accordingly.

 - 0 - `unavailable`  : Not Equipped or unavailable
 - 1 - `time-100-000` : Better than 100 Seconds
 - 2 - `time-050-000` : Better than 50 Seconds
 - 3 - `time-020-000` : Better than 20 Seconds
 - 4 - `time-010-000` : Better than 10 Seconds
 - 5 - `time-002-000` : Better than 2 Seconds
 - 6 - `time-001-000` : Better than 1 Second
 - 7 - `time-000-500` : Better than 0.5 Seconds
 - 8 - `time-000-200` : Better than 0.2 Seconds
 - 9 - `time-000-100` : Better than 0.1 Seconds
 - 10 - `time-000-050` : Better than 0.05 Seconds
 - 11 - `time-000-020` : Better than 0.02 Seconds
 - 12 - `time-000-010` : Better than 0.01 Seconds
 - 13 - `time-000-005` : Better than 0.005 Seconds
 - 14 - `time-000-002` : Better than 0.001 Seconds
 - 15 - `time-000-001` : Better than 0.001 Seconds
 - 16 - `time-000-000-5` : Better than 0.000,5 Seconds
 - 17 - `time-000-000-2` : Better than 0.000,2 Seconds
 - 18 - `time-000-000-1` : Better than 0.000,1 Seconds
 - 19 - `time-000-000-05` : Better than 0.000,05 Seconds
 - 20 - `time-000-000-02` : Better than 0.000,02 Seconds
 - 21 - `time-000-000-01` : Better than 0.000,01 Seconds
 - 22 - `time-000-000-005` : Better than 0.000,005 Seconds
 - 23 - `time-000-000-002` : Better than 0.000,002 Seconds
 - 24 - `time-000-000-001` : Better than 0.000,001 Seconds
 - 25 - `time-000-000-000-5` : Better than 0.000,000,5 Seconds
 - 26 - `time-000-000-000-2` : Better than 0.000,000,2 Seconds
 - 27 - `time-000-000-000-1` : Better than 0.000,000,1 Seconds
 - 28 - `time-000-000-000-05` : Better than 0.000,000,05 Seconds
 - 29 - `time-000-000-000-02` : Better than 0.000,000,02 Seconds
 - 30 - `time-000-000-000-01` : Better than 0.000,000,01 Seconds
 - 31 - `time-000-000-000-005` : Better than 0.000,000,005 Seconds
 - 32 - `time-000-000-000-002` : Better than 0.000,000,002 Seconds
 - 33 - `time-000-000-000-001` : Better than 0.000,000,001 Seconds
 - 34 - `time-000-000-000-000-5` : Better than 0.000,000,000,5 Seconds
 - 35 - `time-000-000-000-000-2` : Better than 0.000,000,000,2 Seconds
 - 36 - `time-000-000-000-000-1` : Better than 0.000,000,000,1 Seconds
 - 37 - `time-000-000-000-000-05` : Better than 0.000,000,000,05 Seconds
 - 38 - `time-000-000-000-000-02` : Better than 0.000,000,000,02 Seconds
 - 39 - `time-000-000-000-000-01` : Better than 0.000,000,000,01 Seconds

Values:
* **unavailable** (0)<br>
* **time-100-000** (1)<br>
* **time-050-000** (2)<br>
* **time-020-000** (3)<br>
* **time-010-000** (4)<br>