Study Details

Study Title: Signalized Intersections: Informational Guide

Authors: Rodegerdts et al.

Publication Date: 2004

Abstract:

Study Citation: Rodegerdts, L. A., Nevers, B., and Robinson, B., "Signalized Intersections: Informational Guide." FHWA-HRT-04-091, (2004)


CMFs Associated With This Study

Category: Access management

Countermeasure: Create directional median openings to allow left-turns and u-turns

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.49511 StarAllAllNot specified

Category:Bicyclists

Countermeasure: Provide bicycle box (advance stop bar to leave dedicated space for cyclists)

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.6535text textVehicle/bicycleAllNot specified

Countermeasure: Provide bike lanes

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.65351 StarVehicle/bicycleK,A,B,CNot specified

Category:Highway lighting

Countermeasure: Install lighting

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.730text textAllAllNot specified
0.8317text textAllK,A,B,CNot specified
0.550text textNighttimeAllNot specified

Category:Intersection geometry

Countermeasure: Convert four-leg intersection into two three-leg intersections

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.43571 StarAllAllNot specifiedAll

Countermeasure: Install left-turn lane (signal has left-turn phase)

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.65351 StarAllAllNot specified

Countermeasure: Install right-turn lane

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.640text textAllK,A,B,CNot specifiedAll

Category:Intersection traffic control

Countermeasure: Convert signal from pedestal-mounted to mast arm

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.51491 StarAllAllNot specified
0.56441 StarAllK,A,B,CNot specifiedAll
0.49511 StarAllONot specifiedAll
0.88121 StarAngleAllNot specifiedAll
0.59411 StarRear endAllNot specifiedAll
0.26741 StarAngleAllNot specifiedAll

Countermeasure: Install emergency vehicle pre-emption systems

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.370text textNot specifiedAllNot specified

Countermeasure: Provide overhead lane-use signs

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.910text textRear endAllNot specified
0.820text textSideswipeAllNot specified

Category:Roadside

Countermeasure: Increase triangle sight distance

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.44561 StarAllKNot specified
0.63371 StarAllA,B,CNot specified