(step1) maneuver
<driving>	::= <maneuver>
	::= <traffic jam drive>
	::= “car following”
	(step 2) environment
	::= “car following” ON <environment>
	::= “car following” ON <physical infrastructure>
	::= “car following” ON <roadway geometry><roadway types>
	::= “car following” ON “straightaways”, “urban”
	(step3) time
	::= “car following” ON “straightaways”, “urban” AT “time”
	(step4) events
	::= “car following” ON “straightaways”, “urban” AT “time” WITH <events>
	::= “car following” ON “straightaways”, “urban” AT “time” WITH <object>,<object event>
	::= “car following” ON “straightaways”, “urban” AT “time” WITH “lead vehicle”, “stopped”