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Synthesis of Safety Research Related to Speed and Speed Management - Turner-Fairbank.. Page 11 of' 25 <br /> <br />Sliogeris (1992) Australia <br /> <br />Finch et al. (1994) <br /> <br />Switzerland <br /> <br />Scharping (1994) <br /> <br />Germany <br /> <br />Newstead and Mullan <br />(1996) Australia <br /> <br />Speed Limit Increases <br /> <br />NHTSA (1989) USA <br /> <br />McKnight, Kleinand <br />Tippetts (1990), USA <br /> <br />Garber and Graham USA <br />(1990) (40 States) <br /> <br />Streff and Schultz USA <br />(1991) (Michigan) <br /> <br />Pant, Adhami and USA <br />Niehaus (1992) (Ohio) <br /> <br />Sliogeris (1992) Australia <br /> <br />Lave and Elias (1994) USA <br /> (40 states) <br /> <br />Iowa Safety Task Force USA <br />(1996) (Iowa) <br /> <br /> 110 km/h to 100 <br /> km/h <br /> (68 mi/h to 62 <br /> mi/h) <br /> 130 km/h to 120 <br /> km/h <br /> (81 mi/h to 75 <br /> mi/h) <br />60 km/h to 50 <br />km/h <br />(37 mi/h to 31 <br />mi/h) <br />5-20 km/h <br />decreases <br />(3-12 km/h <br />decreases) <br /> <br /> 55 mi/h to 65 <br /> mi/h <br /> (89 km/h to 105 <br /> km/h) <br /> 55 mi/h to 65 <br /> mi/h <br /> (89 km/h to 105 <br /> km/h) <br /> 55 mi/h to 65 <br /> mi/h <br /> (89 km/h to 105 <br /> km/h) <br /> 55 mi/h to 65 <br /> mi/h <br /> (89 km/h to 105 <br /> km/h) <br /> 55 mi/h to 65 <br /> mi/h <br /> (89 km/h to 105 <br /> km/h) <br />100 km/h to 110 <br />km/h <br />(62 mi/h to 68 <br />mi/h) <br />55 mi/h to 65 <br />mi/h <br />(89 km/h to 105 <br />km/h) <br />55 mi/h to 65 <br />mi/h <br />(89 km/h to 105 <br />km/h) <br /> <br />Parker (1992) USA <br /> (Michigan) Various <br /> <br /> 5-20 km/h <br />Newstead and Mullan Australia increases <br />(1996) (Victoria) (3-12 km/h <br /> increases) <br /> <br />Injury crashes declined by 19% <br /> <br />Speeds declined by 5 km/h <br />Fatal crashes declined by 12% <br /> <br />Crashes declined by 20% <br /> <br />No significant change (4 % increase <br />relative to sites not changed) <br /> <br />Fatal crashes increased by 21% <br /> <br />Fatal crashes increased by 22% <br />Speeding increased by 48% <br /> <br />Fatalities increased by 15% <br />Decrease or no effect in12 States <br /> <br />Fatal and injury crashes increased <br />significantly on rural freeways <br /> <br />Injury and property damage crashes <br />increased but not fatal crashes <br /> <br />Injury crashes increased by 25% <br /> <br />Statewide fatality rates decreased 3-5% <br />(Significant in 14 of 40 States) <br /> <br />Fatal crashes increased by 36% <br /> <br />No significant changes <br /> <br />Crashes increased overall by 8% <br />35% decline in zones raised from 60-80 <br /> <br />http://www.ntl.bts.gov/ntl/DOCS/speed/speed.htm 07/19/2000 <br /> <br /> <br />