CMF / CRF Details
CMF ID: 11139
Coordinated Ramp Metering
Description:
Prior Condition: Ramp without ramp metering
Category: Advanced technology and ITS
Study: Before-After Safety Evaluation of Coordinated Ramp Metering System using Empirical Bayes Approach: A Case Study on I-80 in California, Amirarsalan Mehrara Molan, Anurag Pande, and Stuart Madison Harvey, 2022
Star Quality Rating: | [View score details] |
Rating Points Total: | 85 |
Crash Modification Factor (CMF) | |
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Value: | 1.12 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | -12 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | All |
Crash Severity: | O (property damage only) |
Roadway Types: | Principal Arterial Interstate |
Street Type: | Two-Way |
Minimum Number of Lanes: | 8 |
Maximum Number of Lanes: | 10 |
Number of Lanes Direction: | Both Directions |
Number of Lanes Comment: | |
Crash Weather: | Not specified |
Road Division Type: | Divided by Median |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Not specified |
Traffic Volume: | |
Average Traffic Volume: | 187173 Annual Average Daily Traffic (AADT) |
Time of Day: | Not specified |
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 | |
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Date Range of Data Used: | 2012 to 2019 |
Municipality: | |
State: | CA |
Country: | |
Type of Methodology Used: |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Aug 25, 2022 |
Comments: | This is the CMF for the entire corridor PDO crashes. |