Study Details
Signalized Intersections: Informational Guide
Study ID: 82
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 |  | All | All | Not specified | |
Category:Bicyclists
Countermeasure: Provide bicycle box (advance stop bar to leave dedicated space for cyclists)
Countermeasure: Provide bike lanes
| CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
|---|
| 0.65 | 35 | | Vehicle/bicycle | K,A,B,C | Not specified | |
Category:Highway lighting
Countermeasure: Install lighting
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 | | 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 | | All | All | Not specified | |
Countermeasure: Install right-turn lane
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 | | All | All | Not specified | |
| 0.56 | 44 | | All | K,A,B,C | Not specified | All |
| 0.88 | 12 | | Angle | All | Not specified | All |
| 0.59 | 41 | | Rear end | All | Not specified | All |
| 0.26 | 74 | | Angle | All | Not specified | All |
Countermeasure: Install emergency vehicle pre-emption systems
Countermeasure: Provide overhead lane-use signs
Category:Roadside
Countermeasure: Increase triangle sight distance
| CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
|---|
| 0.44 | 56 | | All | K | Not specified | |
