CMF / CRF Details

CMF ID: 9120

Median treatment for ped/bike safety

Description: Install various median treatment: median fencing, sidewalk fencing, median brick planters, pedestrian islands

Prior Condition: No Prior Condition(s)

Category: Roadside

Study: Analyzing the Impact of Median Treatments on Pedestrian/Bicyclist Safety, Zhang et al., 2017

 
Star Quality Rating: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.86
Adjusted Standard Error:
Unadjusted Standard Error: 0.04
Crash Reduction Factor (CRF)
Value: 14   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 4
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type: Divided by Median
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: All
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: 1998 to 2016
Municipality:
State: MD
Country: USA
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 906 crashes after
Sample Size (sites): 18 sites before, 18 sites after
Sample Size (site-years): 54 site-years before
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jan-17-2018
Comments: For all crashes, not just ped/bike related.