CMF / CRF Details
Presence of grade-separated interchange
Countermeasure ID: 3041
Description: This CMF represents the expected change in crashes for high-capacity roadways with at least one grade-separtated interchange compared to those segments with no access points.
Prior Condition: Cross-sectional comparison of high-capacity roadways in Spain with and without grade-separated interchanges.
Category: Access management
Study: Evaluation Of The Effectiveness Of Safety-Based Incentives In Public Private Partnerships: An Empirical Analysis For The Case Of Spain, Thais Rangel, José Manuel Vasallo, and Blanca Arenas, 2011
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.77 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.78 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -77 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 78 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | K (fatal) |
| Roadway Types: | Not Specified |
| Street Type: | |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | All |
| Traffic Volume: | Minimum of 1094 to Maximum of 213544 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 30277 Annual Average Daily Traffic (AADT) |
| Time of Day: | All |
| 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: | 1996 to 1996 |
| Municipality: | |
| State: | notusa |
| Country: | Spain |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (miles): | 4800 miles |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jul 15, 2011 |
| Comments: | |
[View score details]