CMF / CRF Details
Presence of an elevated road above intersection
Countermeasure ID: 5232
Description: Intersection location is below an elevated roadway
Prior Condition: No Prior Condition(s)
Category: Intersection geometry
Study: Corridor-level signalized intersection safety analysis in Shanghai, China using Bayesian hierarchal models, Kun Xie, Xuesong Wang, Helai Huang, Xiahong Chen, 2013
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.58 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.32 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -58 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 31.9 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | All |
| 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: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| If countermeasure is intersection-based |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 7700 to Maximum of 140300 Average Daily Traffic (ADT) |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | 46200 Average Daily Traffic (ADT) |
| Average Minor Road Volume : | |
| Development Details |
|---|
| Date Range of Data Used: | 2009 to 2009 |
| Municipality: | |
| State: | |
| Country: | China |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (site-years): | 195 site-years |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 02, 2013 |
| Comments: | Major road volumes are actually total entering traffic |
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