Stijn Daniels1, Tom Brijs, Erik Nuyts, Geert Wets. 1. Hasselt University, Transportation Research Institute, Wetenschapspark 5 bus 6, 3590 Diepenbeek, Belgium. stijn.daniels@uhasselt.be
Abstract
PROBLEM: Previous research indicated that conversions of intersections into roundabouts appear to increase the number of injury crashes with bicyclists. However, it was assumed that the effectiveness of roundabouts could vary according to some differences in design types of cycle, facilities and other geometrical factors. METHOD: Regression analyses on effectiveness-indices resulting from a before-and-after study of injury crashes with bicyclists at 90 roundabouts in Flanders, Belgium. RESULTS: Regarding all injury crashes with bicyclists, roundabouts with cycle lanes appear to perform significantly worse compared to three other design types (mixed traffic, separate cycle paths, and grade-separated cycle paths). Nevertheless, an increase of the severest crashes was noticed, regardless of the design type of the cycle facilities. Roundabouts that are replacing signal-controlled intersections seem to have had a worse evolution compared to roundabouts on other types of intersections. IMPACT ON INDUSTRY: The results might affect design guidelines for roundabouts, particularly for the accommodation of bicyclists.
PROBLEM: Previous research indicated that conversions of intersections into roundabouts appear to increase the number of injury crashes with bicyclists. However, it was assumed that the effectiveness of roundabouts could vary according to some differences in design types of cycle, facilities and other geometrical factors. METHOD: Regression analyses on effectiveness-indices resulting from a before-and-after study of injury crashes with bicyclists at 90 roundabouts in Flanders, Belgium. RESULTS: Regarding all injury crashes with bicyclists, roundabouts with cycle lanes appear to perform significantly worse compared to three other design types (mixed traffic, separate cycle paths, and grade-separated cycle paths). Nevertheless, an increase of the severest crashes was noticed, regardless of the design type of the cycle facilities. Roundabouts that are replacing signal-controlled intersections seem to have had a worse evolution compared to roundabouts on other types of intersections. IMPACT ON INDUSTRY: The results might affect design guidelines for roundabouts, particularly for the accommodation of bicyclists.
Authors: Kay Teschke; M Anne Harris; Conor C O Reynolds; Meghan Winters; Shelina Babul; Mary Chipman; Michael D Cusimano; Jeff R Brubacher; Garth Hunte; Steven M Friedman; Melody Monro; Hui Shen; Lee Vernich; Peter A Cripton Journal: Am J Public Health Date: 2012-10-18 Impact factor: 9.308
Authors: M Anne Harris; Conor C O Reynolds; Meghan Winters; Peter A Cripton; Hui Shen; Mary L Chipman; Michael D Cusimano; Shelina Babul; Jeffrey R Brubacher; Steven M Friedman; Garth Hunte; Melody Monro; Lee Vernich; Kay Teschke Journal: Inj Prev Date: 2013-02-14 Impact factor: 2.399
Authors: Nicole T R Romanow; Amy B Couperthwaite; Gavin R McCormack; Alberto Nettel-Aguirre; Brian H Rowe; Brent E Hagel Journal: J Environ Public Health Date: 2012-11-28