CMF / CRF Details

CMF ID: 10556

Implement transit signal priority

Description: Transit signal priority (TSP) is a type of transit preferential treatment implemented at signalized intersections to reduce (bus or urban rail) transit delays by providing extended or early green time 3 to transit vehicles in operation.

Prior Condition:  No Prior Condition(s)

Category: Transit

Study: Developing Florida-specific Mobility Enhancement Factors (MEFs) and Crash Modification Factors (CMFs) for TSM&O Strategies, Alluri et al., 2020

 
Star Quality Rating:4 Stars  [View score details]
Rating Points Total:125
Crash Modification Factor (CMF)
Value:0.88
Adjusted Standard Error:
Unadjusted Standard Error:0.02
Crash Reduction Factor (CRF)
Value:12  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:2
Applicability
Crash Type:All
Crash Severity:All
Roadway Types:Principal Arterial Other
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:6
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:30
Maximum Speed Limit:45
Speed Unit:mph
Speed Limit Comment:
Area Type:Urban
Traffic Volume:Minimum of 1500 to Maximum of 41000 Annual Average Daily Traffic (AADT)
Average Traffic Volume:19122 Annual Average Daily Traffic (AADT)
Time of Day:
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:2014 to 2018
Municipality:
State:FL
Country:USA
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (sites):12 sites before, 12 sites after
Sample Size (miles):17.6 miles before, 17.6 miles after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 17, 2020
Comments: