CMF / CRF Details

CMF ID: 2917

Install a pedestrian hybrid beacon (PHB or HAWK)

Description:

Prior Condition: Minor-road stop-controlled intersection

Category: Pedestrians

Study: Safety Effectiveness of the HAWK Pedestrian Crossing Treatment, Fitzpatrick, K., and Park, E.S., 2010

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.849
Adjusted Standard Error:
Unadjusted Standard Error: 0.118
Crash Reduction Factor (CRF)
Value: 15   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 11.8
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not Specified
Number of Lanes: 4 to 6
Road Division Type: All
Speed Limit: 30 to 40 mph
Area Type: Urban and suburban
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
Traffic Control: Other
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume : 39700 Annual Average Daily Traffic (AADT)
Average Minor Road Volume : 711 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used: 2002 to 2008
Municipality: Tucson
State: AZ
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-21-2011
Comments: The authors of this study also experimented with producing additional CMFs from an alternate dataset of crashes (based on a different definition of relation to intersection). Since this did not add new knowledge to this topic, these CMFs were not included in the Clearinghouse. The CMFs reported in the Clearinghouse reflect the final CMFs noted in the report summary and abstract.