Corridor-level signalized intersection safety analysis in Shanghai, China using Bayesian hierarchical models

► In Shanghai, the road network density is relatively high and the distance between signalized intersections is small. ► Adjacent signalized intersections located along the same corridor share similar traffic flows, and signals are usually coordinated. ► Mean speeds and speed variances of corridors were acquired from taxis equipped with Global Positioning Systems (GPS). ► Bayesian hierarchical models were applied to identify crash risk factors at both the intersection and the corridor levels. ► Intersections along corridors with lower mean speeds were associated with fewer crashes than those with higher speeds.