Variable Speed Limit Signs: Control and Setting Locations in Freeway Work Zones

Table 1

Result of minimum comprehensive accident rate model.

/VSLS number	(minimum comprehensive accident rate)/(10^−7⋅pcu^−1⋅km^−1)	(speed limit value)/(km⋅h^−1)
1	2.247	100
2	1.124	100, 90
3	0.749	100, 90, 80
4	0.562	100, 90, 80, 70
5	0.450	100, 90, 80, 70, 60
6	0.375	100, 90, 80, 70, 60, 50
7	0.321	100, 90, 80, 70, 60, 50, 40
8	0.281	100, 90, 80, 70, 60, 50, 40, 30