Kuo, Pei-Fen; Lord, Dominique - In: Transportation Research Part A: Policy and Practice 49 (2013) C, pp. 256-269
The before–after study is still the most popular method used by traffic engineers and transportation safety analysts for evaluating the effects of an intervention. Compared to the cross-sectional study, the before–after study has lower within-subject variability since it directly accounts...