Table 1.
Intervention implementation zones and timetable obtained from the City of Edinburgh council (Scottish Government, 2020) [30].
Table 2.
Predictor variables included in mixed effects logistic regression model.
Fig 1.
Boxplots for before and after speed distributions for all 66 monitored streets.
Table 3.
Summary of overall before and after average speed (mph) and volume for all 66 monitored streets.
Fig 2.
Histogram of average speeds on 20mph streets in the City of Edinburgh for each of the 66 monitored sites (n = 12,672 observations).
Table 4.
Speed bin summaries showing the percentage of observations (n = 12,672) in four speed bins (ranges) before and after the 20mph speed limit implementation (speed bins derived from the raw speed observations).
Fig 3.
Boxplots for before and after average volume distributions.
Table 5.
Summary of before and after speeds (mean, SD, 95%CI) by day of week (mph).
Fig 4.
a. Average speeds on 20mph streets in Edinburgh by time of day (from 0:00 to 23:45 by 15-minute intervals). b. Traffic volume on 20mph streets in Edinburgh by time of day (from 0:00 to 23:45 by 15-minute intervals).
Table 6.
Summary of before and after speeds in mph (mean, SD, 95%CI) by pre-implementation speed (mph).
Table 7.
Results for fixed effects (parameters of interest) of mixed effects logistic regression model for quantifying the odds of speed reduction.