Study Details

Study Title: Low-Cost Safety Improvements Chapter 27, The Traffic Safety Toolbox: a primer on traffic safety

Authors: Polanis

Publication Date: 1999

Abstract: None.

Study Citation: Polanis, S. F., "Low-Cost Safety Improvements." Chapter 27, The Traffic Safety Toolbox: a primer on traffic safety, Washington, D.C., Institution of Transportation Engineers, (1999) pp. 265-272.


CMFs Associated With This Study

Category: Delineation

Countermeasure: Mark pavement with supplementary warning messages

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.7 30 1 Star Angle All Not specified Urban

Category:Intersection traffic control

Countermeasure: Add all-red clearance interval (from 0 to 1 second)

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1 0 1 Star Angle All Not specified Urban

Countermeasure: Add centerline and STOP bar, replace 24-inch with 30-inch stop signs

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.33 67 1 Star Angle All Not specified Urban

Countermeasure: Convert minor-road stop control to all-way stop control

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.2 80 1 Star Angle All Not specified Urban

Countermeasure: Install double stop signs

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.45 55 1 Star Angle All Not specified Urban

Countermeasure: Install larger signal lenses (12 inch)

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.54 46 2 Stars Angle All Not specified Urban

Countermeasure: Replace Night-Time Flash with Steady Operation

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.25 75 1 Star Angle All Not specified Urban

Category:Signs

Countermeasure: Install advance warning signs (positive guidance)

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