CMF / CRF Details

CMF ID: 10555

Install ramp meter

Description: Install a ramp meter signal at the on-ramp to enhance mainline throughput and reduce system-wide delay.

Prior Condition: No Prior Condition(s)

Category: Advanced technology and ITS

Study: Developing Florida-specific Mobility Enhancement Factors (MEFs) and Crash Modification Factors (CMFs) for TSM&O Strategies, Alluri et al., 2020

Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 85
Crash Modification Factor (CMF)
Value: 0.59
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 41   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Type: All
Crash Severity: All
Roadway Types: Principal Arterial Interstate
Number of Lanes:
Road Division Type: Divided by Median
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:
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: 2016 to 2018
Municipality: Miami-Dade County
State: FL
Country: USA
Type of Methodology Used: 5
Sample Size (crashes): 493 crashes
Sample Size (miles): 10 miles
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-17-2020
Comments: Safety benefit of ramp metering system between operational vs non-operational