Enhancing Freeway Safety through Intervening in Traffic Flow Dynamics Based on Variable Speed Limit Control

Table 4

Crash risk evaluation models for downstream and upstream of the HDMS.

Variables	B	S.E.	Wals	df	Sig.
Q	0.012	0.001	64.270	1	0.000
DV	0.139	0.026	27.961	1	0.000
Constant	-5.912	0.714	68.650	1	0.000
Downstream  AUC		0.759
Variables	B	S.E.	Wals	df	Sig.
Q	0.013	0.002	38.924	1	0.000
DV	0.093	0.029	10.320	1	0.001
Constant	-4.948	0.776	40.608	1	0.000
Upstream  AUC		0.755