CMF / CRF Details

CMF ID: 9369


Star Quality Rating:	[View score details]
Rating Points Total:	105

Crash Modification Factor (CMF)
Value:	0.63
Adjusted Standard Error:
Unadjusted Standard Error:	0.098

Crash Reduction Factor (CRF)
Value:	37 (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:	9.8

Applicability
Crash Type:	All
Crash Severity:	K (fatal),A (serious injury),B (minor injury),C (possible injury),O (property damage only)
Roadway Types:	Principal Arterial Other
Street Type:
Minimum Number of Lanes:	1
Maximum Number of Lanes:	4
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:	Not specified
Road Division Type:
Minimum Speed Limit:	25
Maximum Speed Limit:	65
Speed Unit:	mph
Speed Limit Comment:
Area Type:	Urban
Traffic Volume:	Minimum of 2100 to Maximum of 40500 Annual Average Daily Traffic (AADT)
Average Traffic Volume:	8659 Annual Average Daily Traffic (AADT)
Time of Day:	Not specified
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:	2004 to 2013
Municipality:
State:	FL
Country:	USA
Type of Methodology Used:	Before/after using comparison group

Other Details
Included in Highway Safety Manual?	No
Date Added to Clearinghouse:	Jun 17, 2018
Comments:	1) First year after treatment implementation2) Heavy vehicle >3.3% 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.