Methods | CBA conducted between 2005 and 2012 with minimum of 1 years before and 1 year after data. Median RLC “go live” data of July 31, 2007, use for before/after distinction for control group |
Participants | All signalized intersections in Chicago |
Interventions | 170 RLC signalized intersections, all other signalized non‐camera intersections in Chicago used as control |
Outcomes | Angle injury crashes, rear end injury crashes, turning injury crashes, total injury crashes |
Notes | Changes in reporting in 2009 raised the minimum cost for PDO reporting from $500 to $1,500; therefore, only crashes featuring at least one injury were used |