Release WZDx v4.1

[mark-mockett]

The PR marks the release of version 4.1 of the WZDx specification.

Noteworthy documentation changes are that the two feeds that WZDx defines are renamed:

• Rename the "SwzDeviceFeed" to "DeviceFeed" or "WZDx Device Feed"
• Rename the "WZDxFeed" to "WorkZoneFeed" or "WZDx Work Zone Feed"

Changes to the specification are listed below:

New Functionality

• Add is_moving boolean property to the FieldDeviceCoreDetails to allow indicating if any field device is moving as part of a mobile operation.
• Add road_direction property to the FieldDeviceCoreDetails to allow providing the direction of the roadway that a field device is associated with.
• Recommend using Universally Unique Identifiers (UUID) for the id property of the RoadEventFeature, FieldDeviceFeature, and FeedDataSource, noting that a UUID may be required in the next major release.
• Add name property to RoadEvenCoreDetails to allow providing a human-friendly name for a road event.
• Add the following values to the MarkedLocationType enumerated type:
  • personal-device
  • ramp-closure
  • road-closure
  • delineator
• Add the following values to the Direction enumerated type:
  • undefined
  • unknown
• Add no-passing to the RestrictionType enumerated type.
• Add a sign_text property to the FlashingBeacon object.
• Add a TrafficSignal object to allow represent temporary traffic signals in a WZDx Device Feed.
• Add two-way-center-turn-lane to the LaneType enumerated type to replace the existing center-left-turn-lane with a more generic value.

Refactoring

• Deprecate is_moving property on the ArrowBoard; use the new is_moving on the FieldDeviceCoreDetails instead.
• Change the conformance of the road_event_id property on the TrafficSensorLaneData from "Required" to "Optional" to allow providing lane-level data without a defined road event.
• Deprecate the road_event_feed_info property on the [WorkZoneFeed] object; use the new feed_info property instead.
• Add is_start_position_verified and is_end_position_verified boolean properties to the WorkZoneRoadEvent to allow indiciating if the start and end positions are verified and clarify what verified means; these properties replace beginning_accuracy and ending_accuracy.
• Deprecate the beginning_accuracy and ending_accuracy properties on the WorkZoneRoadEvent object; use the new is_start_position_verified and is_end_position_verified properties instead.
• Add is_start_date_verified and is_end_date_verified boolean properties to the WorkZoneRoadEvent to allow indiciating if the start and end date and times are verified and clarify what verified means; these properties replace start_date_accuracy and end_date_accuracy.
• Deprecate the start_date_accuracy and end_date_accuracy properties on the WorkZoneRoadEvent object; use the new is_start_date_verified and is_end_date_verified properties instead.
• Deprecate the event_status property on the WorkZoneRoadEvent object.
• Change the conformance of the road_names property on the FieldDeviceCoreDetails from "Required" to "Optional".
• Deprecate the traffic-signal value in the [MarkedLocationType] enumerated type; use the new [TrafficSignal] object instead.
• Deprecate the center-left-turn-lane value in the LaneType enumerated type; use the new two-way-center-turn-lane instead.
• Add a related_road_events property (and new supporting object RelatedRoadEvent and enumerated type RelatedRoadEventType) to the RoadEventCoreDetails to allow explicitly defining relationships/connections between road events; this replaces the Relationship object/concept.
• Deprecate the relationship property on the RoadEventCoreDetails; use the new related_road_events property instead.

Cleanup

• Change the type of the average_speed_kph, volume_vph, and occupancy_percent properties on the TrafficSensor and TrafficSensorLaneData object from "Integer" to "Number"
• Change the allowed minimum value for average_speed_kph on TrafficSensorLaneData from 1 to 0.
• Add a feed_info property to the WorkZoneFeed object to replace the road_event_feed_info.
• Expand the description of the update_date property on the RoadEventCoreDetails and FieldDeviceCoreDetails to clarify what the value represents.
• Remove the RoadRestrictionFeed (it moved to usdot-jpo-ode/TDx).

edited by @j-d-b

[j-d-b]

Once @j-d-b, @sknick-iastate, and @jlarsonOmahaNE review and approve, this can be merged to release v4.1.

[j-d-b]

@mark-mockett, @sknick-iastate, @jlarsonOmahaNE released! I'll tag the commit and add the release notes to "Releases".