Research Article
Simulation-Based Framework for Estimating Crash Modification Factors (CMFs): A Case Study for ITS Countermeasures
Table 5
Validation of proposed simulation-based method for estimating CMFs.
| | Countermeasures | Using simulation-based method proposed in this paper | Using crash prediction model | Percentage error |
| | Ramp Metering: Study 1 [56] | % Reduction | 3.2% | 5% | - - | | CMF | 0.97 | 0.95 | 2.1% |
| | Ramp Metering: Study 2 [59] | % Reduction | 3.2% | 1.65% | - - | | CMF | 0.97 | 0.98 | 1.0% |
| | Variable Speed Limit Assignment: Study 3 [60] | % Reduction | 7.9% | 3.14~4.94% | - - | | CMF | 1.08 | 1.04 | 3.8% |
| | Variable Speed Limit Assignment: Study 4 [61] | % Reduction | 7.9% | 24.0% | - - | | CMF | 1.08 | 0.76 | 42.0% |
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