Laserfiche WebLink
Future Year Concept Traffic Analysis <br />Future Year Safety Analysis <br />To quantify the reduction in crashes for each concept, the CMF Clearinghouse website was used. The <br />Clearinghouse website provides crash modification factors (CMFs) for various countermeasures <br />implemented on a segment or at an intersection. Using the Clearinghouse, CMFs were selected based <br />on the relevance of the countermeasure to the concept analyzed. The CMFs used for the various <br />improvement concepts are shown in Table 10 through Table 13. <br />Table 10: Roundabout Crash Modification Factors <br />CMF <br />0.57 - 0.62 <br />0.17 - 0.21 <br />Crash Type <br />Table 11: Bypass to Turn Lane Crash Modification Factors <br />Crash Severity <br />All <br />K,A, B, C <br />Area Type <br />CMF Crash Type Crash Severity Area Type <br />0.88* <br />All All <br />*Value was calculated by combining two CMFs since there was no CMF for bypass to dedicated turn lane <br />Table 12: Turn Lane on Minor Approach Crash Modification Factors <br />CMF Crash Type Crash Severity Area Type <br />0.75 <br />Table 13: Increased Horizontal Curve Radius Crash Modification Factors <br />CMF Crash Type Crash Severity Area Type <br />0.77 Rural <br />The CMFs for increased horizontal curve radius show in Table 13 were calculated using the following <br />equation: <br />24 <br />