CMF / CRF Details
CMF ID: 6960
Provide on-ramp
Description: Presence of on-ramp
Prior Condition: No on-ramp present
Category: Access management
Study: NCHRP Report 794: Median Cross-Section Design for Rural Divided Highways, Graham et al., 2014
Star Quality Rating: | [View score details] |
Rating Points Total: | 55 |
Crash Modification Factor (CMF) | |
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Value: | 2.39 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.86 |
Crash Reduction Factor (CRF) | |
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Value: | -139 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 86 |
Applicability | |
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Crash Type: | Fixed object |
Crash Severity: | All |
Roadway Types: | Principal Arterial Other Freeways and Expressways |
Street Type: | |
Minimum Number of Lanes: | 4 |
Maximum Number of Lanes: | 4 |
Number of Lanes Direction: | |
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: | Rural |
Traffic Volume: | |
Average Traffic Volume: | |
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 | |
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Date Range of Data Used: | 2000 to 2004 |
Municipality: | |
State: | NC |
Country: | USA |
Type of Methodology Used: | Regression cross-section |
Sample Size (miles): | 67 miles |