CMF / CRF Details

CMF ID: 4117

Implement Barnes Dance

Description: The Barnes Dance, also called a pedestrian scrammble, is a special phase added to the regular two-phase permissive signal timing, which stops vehicle traffic in all directions and allows pedestrians to cross in any fashion, including diagonally.

Prior Condition: Barnes Dance, also called pedestrian scramble, is a special phase added to the regular two-phase permissive signal timing, which stops vehicle traffic in all directions and allows pedestrians to cross in any fashion, including diagonally.

Category: Pedestrians

Study: The Relative Effectiveness of Pedestrian Safety Countermeasures at Urban Intersections - Lessons from a New York City Experience, Li Chen, Cynthia Chen, and Reid Ewing, 2012

Image: View the countermeasure image.

 
Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.49
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 51   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: Vehicle/pedestrian
Crash Severity: All
Roadway Types: Not Specified
Number of Lanes:
Road Division Type: All
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: 3-leg,4-leg,More than 4 legs
Traffic Control: Signalized
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 2008
Municipality: New York City
State: NY
Country: USA
Type of Methodology Used: Simple before/after
Sample Size (crashes): 97 crashes before, 19 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-01-2012
Comments: The corresponding change in crashes in the comparison group was a 9 percent reduction in pedestrian-vehicle crashes. This could be used to adjust the treatment effect to account for other factors not related to the treatment.