| Methods | CBA with variable amounts of before and after data |
| Participants | 9 signalized intersections in Council Bluffs, Iowa |
| Interventions | 5 RLC intersections (7 intersection approach roads) |
| Outcomes | Total crashes, rear end crashes, RLR crashes (identified from crash report as ran a red signal) |
| Notes | Further cross sectional analysis in Clive, Iowa not extracted |
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