Research on a Conflict Early Warning System Based on the Active Safety Concept

Table 1

Minimum acceptable gap for vehicles through an intersection.

Direction	Minimum acceptable gap (Tc)
	Small car	Medium car	Large car	Trailer
Turn left	5.77s	6.91s	7.48s	8.05s
Go straight	4 .81s	5.77s	7.11s	7.18s
Turn right	2 .94s	3 .69s	4.15s	4.62s