Crash Frequency Minimization with Severity Mitigation in Road Geometric Design Using Chance Constraint Programming Optimization

Table 1

Collected parameters.

Segment parameter	Description
Through lane width	Through lane width (ft)
Average daily traffic	Average daily traffic on the street
Shoulder presence indicator	0, if there is no shoulders on the street;
	1, if street has shoulder
Shoulder width	Shoulder width (ft)
Shoulder type indicator	1, if street has paved shoulder;
	2, if street has gravel shoulder;
	3, if street has turf shoulder;
	4, if street has composite shoulder
Median presence indicator	0, if there is no median on the street;
	1, if there is median on the street
Median type	0, if street has painted or shared median;
	1, if street has curbed median
Median width	Median width (ft)
On-street parking presence indicator	0, no on-street parking;
	1, has on-street parking
Road speed limit	Road speed limit (MPH)
Number of lanes	Number of through lanes in one direction on the street