ASTM PS 105-99: Specification for Dedicated Short Range Communication (DSRC) Data Link Layer: Medium Access and Logical Link Control

Source Element	Destination Element	Flow
City of Midland Field Equipment	City of Midland Fire and EMS Vehicles	local signal preemption request
	City of Midland Police Vehicles	local signal preemption request
	EZ Rider Fixed Route Transit Vehicles	local signal priority request
City of Odessa Field Equipment	City of Odessa Fire and EMS Vehicles	local signal preemption request
City of Odessa Field Equipment	EZ Rider Fixed Route Transit Vehicles	local signal priority request
Commercial Vehicles	DPS Electronic Screening Stations	electronic screening request
	DPS Electronic Screening Stations	pass/pull-in
	DPS Electronic Screening Stations	screening event record
	DPS Weigh in Motion	electronic screening request
	DPS Weigh in Motion	pass/pull-in
	DPS Weigh in Motion	request tag data
	DPS Weigh in Motion	screening event record
	US BCBP Electronic Clearance System	electronic screening request
	US BCBP Electronic Clearance System	pass/pull-in
	US BCBP Electronic Clearance System	screening event record
DPS Electronic Screening Stations	Commercial Vehicles	screening event record
DPS Weigh in Motion	Commercial Vehicles	screening event record
DPS Weigh in Motion	Commercial Vehicles	tag data
Private Vehicles	TxDOT Odessa District Field Sensors	request tag data
TxDOT Odessa District Field Sensors	Private Vehicles	vehicle probe data
US BCBP Electronic Clearance System	Commercial Vehicles	screening event record

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