Table 1

Frequency and incidence rate ratios of all collisions by pedestrian countdown signal (PCS) installation (pre, post) and by season (summer, winter)

Collision typeTotal I-M*I-M (≥1 collision)# of collisionsIRR(95% CI) (adjusted for covariates)†p Value
All collisions
 Pre-PCS42 90493510231
 Post-PCS29 619154817371.26 (1.11 to 1.42)<0.001
 Summer36 406104111421
 Winter36 117144216181.19 (1.09 to 1.31)<0.001
  • *Intersection-months.

  • †Covariates include: year, season and baseline pedestrian-motor vehicle rate.

  • IRR, incidence rate ratio.