CMF / CRF Details

CMF ID: 2911

Install a pedestrian hybrid beacon (PHB or HAWK)


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]
Rating Points Total: 100
Crash Modification Factor (CMF)
Value: 0.712
Adjusted Standard Error:
Unadjusted Standard Error: 0.065
Crash Reduction Factor (CRF)
Value: 29   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 6.5
Crash Type: All
Crash Severity: All
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
Type of Methodology Used: 2
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. The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development.