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

Table 6

Speed limit impacts under different flow conditions.

Flow condition; (veh/h)	Speed Limit (VSL) (km/h)	Acceptable crash risk	Average Delay; (s)	Crash risk benefit ()	Average Delay Loss ()
5000	60	0.23	153.24	29.81	258.98
4000	70	0.27	158.92	39.73	167.51
3000	80	0.16	44.64	25.47	35.89
2000	120	0.09	17.94	0	0