Simulation-Based Framework for Estimating Crash Modification Factors (CMFs): A Case Study for ITS Countermeasures

Table 4

Conflict reduction percentage after implementation of ITS countermeasures.

Countermeasures	Total Conflicts	% Conflicts Reduction
Base Model	40,332	- -
Alt 1: Ramp Metering	39,045	3.2%
Alt 2: Variable Speed Limit Assignments	43,543	− 7.9%
Alt 3: Junction Controls	40,083	0.6%
Alt 4: Dynamic Lane Assignment	38,267	5.1%

Negative percentage of conflict represents the increase of conflicts after countermeasure implementation.