ASTM 5 GHz Data Link: Standard Specification for 5.9 GHz Data Link Layer

Source Element	Destination Element	Flow
City of Longview Field Equipment	City of Longview Fire/EMS Vehicles	local signal preemption request
City of Tyler Field Equipment	City of Tyler Fire Vehicles	local signal preemption request
City of Tyler Field Equipment	Private EMS Vehicles	local signal preemption request
Commercial Vehicles	TxDOT Tyler District CVO Corridor System	request tag data
County Road and Bridge Vehicles	County Road and Bridge Field Equipment	work zone warning notification
Private Vehicles	TxDOT Tyler District CVO Corridor System	request tag data
TxDOT Tyler District CVO Corridor System	Commercial Vehicles	vehicle probe data
TxDOT Tyler District CVO Corridor System	Private Vehicles	vehicle probe data
TxDOT Tyler District Maintenance Vehicles	TxDOT Tyler District Work Zone Equipment	work zone warning notification
TxDOT Tyler District Traffic Signals	City of Longview Fire/EMS Vehicles	local signal preemption request
	City of Tyler Fire Vehicles	local signal preemption request
	Private EMS Vehicles	local signal preemption request

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