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(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.49 51 2 Stars All All Not specified

Category:Bicyclists

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

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.65 35 Cannot Be Rated Vehicle/bicycle All Not specified

Countermeasure: Provide bike lanes

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.65 35 2 Stars Vehicle/bicycle K,A,B,C Not specified

Category:Highway lighting

Countermeasure: Install lighting

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.7 30 Cannot Be Rated All All Not specified
0.83 17 Cannot Be Rated All K,A,B,C Not specified
0.5 50 Cannot Be Rated Nighttime All Not specified

Category:Intersection geometry

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

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.43 57 2 Stars All All Not specified All

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

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.65 35 1 Star All All Not specified

Countermeasure: Install right-turn lane

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.6 40 Cannot Be Rated All K,A,B,C Not specified All

Category:Intersection traffic control

Countermeasure: Convert signal from pedestal-mounted to mast arm

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.51 49 3 Stars All All Not specified
0.56 44 3 Stars All K,A,B,C Not specified All
0.49 51 3 Stars All O Not specified All
0.88 12 2 Stars Angle All Not specified All
0.59 41 3 Stars Rear end All Not specified All
0.26 74 3 Stars Angle All Not specified All

Countermeasure: Install emergency vehicle pre-emption systems

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.3 70 Cannot Be Rated Not specified All Not specified

Countermeasure: Provide overhead lane-use signs

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.9 10 Cannot Be Rated Rear end All Not specified
0.8 20 Cannot Be Rated Sideswipe All Not specified

Category:Roadside

Countermeasure: Increase triangle sight distance

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.44 56 3 Stars All K Not specified
0.63 37 3 Stars All A,B,C Not specified