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

Source Element	Destination Element	Flow
City of Laredo Bridge System Field Equipment	Commercial Vehicles	vehicle probe data
City of Laredo Bridge System Field Equipment	Private Vehicles	vehicle probe data
City of Laredo Field Equipment	City of Laredo Fire/EMS/HAZMAT Vehicles	local signal preemption request
City of Laredo Trade Tag System	Commercial Vehicles	tag data
City of Laredo Trade Tag System	Private Vehicles	tag data
Commercial Vehicles	City of Laredo Bridge System Field Equipment	request tag data
	City of Laredo Trade Tag System	tag update
	TxDOT Laredo Toll Tag Readers	request tag data
Private Vehicles	City of Laredo Bridge System Field Equipment	request tag data
	City of Laredo Trade Tag System	tag update
	TxDOT Laredo Toll Tag Readers	request tag data
TxDOT Area Construction Vehicles	TxDOT Work Zone Field Equipment	work zone warning notification
TxDOT County Maintenance Vehicles	TxDOT Work Zone Field Equipment	work zone warning notification
TxDOT Laredo Toll Tag Readers	Commercial Vehicles	vehicle probe data
TxDOT Laredo Toll Tag Readers	Private Vehicles	vehicle probe data
TxDOT Laredo Traffic Signals	City of Laredo Fire/EMS/HAZMAT Vehicles	local signal preemption request

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