Synthesis of Safety for Traffic Operations - Transports Canada

Synthesis of Safety for Traffic Operations March 2003
Speed studies were conducted one month and six months after installation, and the results
are shown in Table 6.7. only Treatment 4, the fibre optic sign resulted in a statistically
significant speed reduction.
TABLE 6.7: Impacts of Different School Zone Traffic Control Devices on Speed
85 th Percentile Speed (mph)
Site
After
Before
One month Six months
Control 28.4 29.7 29.7
Treatment 1 27.3 26.8 26.9
Treatment 2 27.4 26.0 27.4
Treatment 3 25.6 26.7 25.3
Treatment 4 33.1 29.8 30.3
Treatment 5 32.7 31.9 N/A
General
University of Washington (2002)
A synopsis of articles on child pedestrian injury interventions using environmental
techniques has been assembled by the University of Washington (2002). The synopsis
includes mainly reviews of traffic calming devices that are intended to increase
pedestrian safety, but also includes some operational changes such as traffic signing. The
articles reviewed used crashes, conflicts, and injuries as the outcomes (measures of
effectiveness). However, some surrogates that are not definitively correlated with
crashes are also included. The main finding is that area-wide traffic calming appears to
reduce injury crashes with CMFs of 0.75, and 0.90 for local and main streets,
respectively. The reader is referred to http://depts.washington.edu/hiprc/
childinjury/topic/pedestrians/environment.html for further information.
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