Schema Structure

General Information

	type	String; "FeatureCollection"	Yes	The GeoJSON object type. For WZDx, this must be the string FeatureCollection.
Feed Info	update_date	String	Yes	The UTC date and time when the GeoJSON file (representing the instance of the feed) was generated.
	publisher	String	Yes	The organization responsible for publishing the feed.
	contact_name	String	Yes	The name of the individual or group responsible for the data feed.
	contact_email	String	Yes	The email address of the individual or group responsible for the data feed
	version	String	Yes	The WZDx format version – 4.2
	license	String	Optional	The URL of the license that applies to the data in the WZDx feed. This must be the string "https://creativecommons.org/publicdomain/zero/1.0/".
	data_source_id
	organization_name

Specific Work Zone Information

Geometry	Coordinates
	Type	Enumerated {LineString, MultiPoint}	Type of event geometry provided	Type of event geometry provided
	ID			The unique Identifier of the work zone
	bbox			Information on the coordinate range for this RoadEventFeature. Must be an array of length 2n where n is the number of dimensions represented in the geometry property, with all axes of the most southwesterly point followed by all axes of the more northeasterly point. The axes order of a bbox follows the axes order of the geometry.
Core details	event_type	Enumerated {work-zone, detour}	Yes	The type/classification of road event.
	data_source_id	String	Yes	Identifies the data source from which the road event originates.
	road_names	Array (string)	Yes	A list of publicly known names of the road on which the event occurs. This may include the road number designated by a jurisdiction such as a county, state or interstate (e.g. I-5, VT 133).
	direction		Yes	The digitization direction of the road that is impacted by the event. This value is based on the standard naming for US roadways and indicates the direction of the traffic flow regardless of the real heading angle.
	name	String	Optional	A human-readable name for the road event.
	description	String	Optional	Short free text description of road event.
	creation_date	String		The UTC time and date when the activity or event was created.
	update_date			The UTC date and time when any information in the RoadEventFeature that the RoadEventCoreDetails applies to was most recently updated or confirmed as up to date.
	start_date	string	Yes	The UTC time and date when the event begins.
	end_date	string	Yes	The UTC time and date when the event ends.
	is_start_date_verified	Boolean	Optional	Indicates if work has been confirmed to have started, such as from a person or field device.
	is_end_date_verified	Boolean	Optional	Indicates if work has been confirmed to have ended, such as from a person or field device.
	is_start_position_verified	Boolean	Optional	Indicates if the start position (first geometric coordinate pair) is based on actual reported data from a GPS-equipped device that measured the location of the start of the work zone.
	is_end_position_verified	Boolean	Optional	Indicates if the end position (last geometric coordinate pair) is based on actual reported data from a GPS-equipped device that measured the location of the end of the work zone.
	work_zone_type	Enumerated {static, moving, planned-moving-area}	Optional	The type of work zone road event, such as if the road event is static or actively moving as part of a moving operation
	location_method	Enumerated {channel device method,sign-method, junction-method, other, unknown	Yes	The typical method used to locate the beginning and end of a work zone impact area.
	vehicle_impact	Enumerated {all-lanes-closed, some-lanes-closed, all-lanes-open, alternating-one-way, some-lanes-closed-merge-left, some-lanes-closed-merge-right, all-lanes-open-shift-left, all-lanes-open-shift-right, some-lanes-closed-split, flagging, temporary-traffic-signal, unknown}	Yes	The impact to vehicular lanes along a single road in a single direction.
Lane	order	Positive Integer	Yes	The position of a lane in sequence on the roadway. This value is used as an index to indicate the order of all lanes provided for a road event, starting with 1 for the left-most lane.
	type	Enumerated {general, exit-lane, exit-ramp, entrance-lane, entrance-ramp , sidewalk, bike-lane, shoulder, parking, median, two-way-center-turn-lane}	Yes	An indication of the type of lane or shoulder.
	Status	Enumerated {open, closed, shift-left, shift-right, merge-left, merge-right, alternating-flow}	Yes	Status of the lane for the traveling public.
	restrictions	Array {type, value, unit}	Optional	A list of zero or more restrictions specific to the lane.
	beginning_cross_street	String	Optional	Name or number of the nearest cross street along the roadway where the event begins.
	ending_cross_street	String	Optional	Name or number of the nearest cross street along the roadway where the event ends.
	beginning_milepost	Number	Optional	The linear distance measured against a milepost marker along a roadway where the event begins.
Types_of_work	type_name	Enumerated {maintenance, minor-road-defect-repair, roadside-work, overhead-work, below-road-work, barrier-work, surface-work, painting, roadway-relocation, roadway-creation	yes	A high-level text description of the type of work being done.
	is_architectural_change	Boolean	Optional	A flag indicating whether the type of work will result in an architectural change to the roadway
worker_presence	are_workers_present	Boolean	Yes	Whether workers are present in the work zone event area. This value should be set in accordance with the definition provided in the definition property if it is provided.
	definition	Array {workers-in-work-zone-working, workers-in-work-zone-not-working, mobile-equipment-in-work-zone-moving , mobile-equipment-in-work-zone-not-moving , fixed-equipment-in-work-zone, humans-behind-barrier, humans-in-right-of-way}	Optional	A list of situations in which workers are considered present in the data provider's jurisdiction.
	method	Enumerated {camera-monitoring, arrow-board-present, cones-present, maintenance-vehicle-present, wearables-present, mobile-device-present, check-in-app, check-in-verbal, scheduled	Optional	Describes the method for how worker presence in a work zone event area is determined.
	worker_presence_last_confirmed_date	String	Optional	The UTC date and time at which the presence of workers was last confirmed.
	confidence	Enumerated {low, medium, high}	Optional	The data producer’s confidence in the value of are_workers_present.