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WZDx Specification v3.0

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@j-d-b j-d-b released this 18 Sep 14:34
1f1f412

WZDx specification v3.0 released on 9/18/2020. This version sees the following changes, as well as consistency/cleanup of all the markdown files in the repository:

Features

  • Restrict version format to major.minor and enforce via v3.0 JSON schema
  • Add order property to lane entity to indicate a lane's position in sequence on the roadway
  • Remove lane_edge_reference and standardize on counting lanes from the left side of the roadway
  • Add event_type property to the road event entity and new Event Type Enumerated Type with the values work-zone and detour, to support adding detour information (and more in the future)
  • Add relationship entity (one per road event entity) to enable describing relationships (hierarchical and sequential) between road events and other non-WZDx entities (such as a work zone phase or project)
  • Add road_event_data_source entity to allow specifying multiple data sources within a single feed
  • Streamline metadata (previously given in an external file, by URL) and add relevant fields to the road_event_feed_info and road_event_data_source entities

Fixes

  • Require restriction_type if providing a lane-level restriction
  • Change Spatial Verification Enumerated Type and Time Verification Enumerated Type values to be all lowercase
  • Remove all plural or nonsensical lane types from the Lane Type Enumerated Type and clarify that each WZDx lane should represent a single lane on the roadway