This article describes the evaluation of a 4-1/2-month multimedia traffic-safety campaign that targeted young drivers in northeastern Tennessee. Discussion groups with teenagers provided the basis for public-service announcements (TV, radio, and billboard), which were developed specifically for this intervention. To determine the impact on crash frequencies among drivers 16-19 years old, baseline, intervention, and follow-up crash data were obtained from statistics maintained by the state. A time-series analysis of these data indicated that during the intervention period, there was a 21.6% decrease in crashes for which 16-19-year-old drivers were at fault, whereas a control location in southeastern Tennessee exhibited no significant change. ____ Tri-Cities ---Intervention Site -----Hamilton County---Comparison Site Pre-InterventionPost-Intervention Figure 2. Frequency of serious-injury crashes involving 16-19-year-old at-fault drivers between 1994 and 1999 occurring in Tri-Cities (treatment) and Hamilton County (comparison), Tennessee. Lines drawn through the data are best-fit, using least-squares linear regression.624 WHITTAM ET AL.
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