CMF / CRF Details
CMF ID: 11239
Install adaptive traffic signal control
Description:
ATSC is a traffic management strategy in which traffic signal timings change, or adapt, based on observed traffic demand. These systems utilize increased detection to continually collect data on observed demand, and signal timings are then re-optimized based on current data.
Prior Condition: Signalized Intersections without Adaptive Signal Control Technology (ASCT)
Category: Intersection traffic control
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.979 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.016 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 2.1 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 1.6 |
| Applicability |
|---|
| Crash Type: | Angle |
| Crash Severity: | All |
| Roadway Types: | All |
| Street Type: | Two-Way |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | Both Directions |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | mph |
| Speed Limit Comment: | |
| Area Type: | Urban and suburban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| 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 11028 to Maximum of 64500 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 1753 to Maximum of 46500 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 37550 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 13550 Annual Average Daily Traffic (AADT) |
| Development Details |
|---|
| Date Range of Data Used: | 2011 to 2018 |
| Municipality: | Seminole County and Orange County |
| State: | FL |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 06, 2022 |
| Comments: | The number of Before and After Crashes/Year for Treatment Intersections is presented in Table 4 in the paper. However, this information was not disaggregated at the intersection level to distinguish between the varying Before and After periods at intersections leading to the number of crashes in the Before and After being recorded as unknown. |
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