De Brabander Bram, Vereeck Lode
Hasselt University, Faculty of Applied Economics, Agoralaan, Building D, B-3590 Diepenbeek, Belgium.
Accid Anal Prev. 2007 May;39(3):591-9. doi: 10.1016/j.aap.2006.10.004. Epub 2006 Nov 21.
This paper examines the road safety effects of roundabouts built in Flanders between 1994 and 2000. While the overall effect is positive (39% reduction of injury accidents), the results vary considerably with the speed limit on the main and adjacent road (the higher, the more effective) and the pre-roundabout signalization of the intersection (32% reduction with traffic lights versus 44% without). However, microscopic analysis reveals that roundabouts are not always effective. Serious injury accidents are estimated to increase by 117% on 70 km/h x 50 km/h intersections equipped with signalization before the roundabout. The number of injury accidents involving vulnerable road users is also found to increase (28%) on 50 km/h x 50 km/h junctions that were originally signalized. Moreover, the vulnerable road user is more likely to get fatally or seriously injured. Therefore, it is concluded that traffic lights protect vulnerable road users more effectively than roundabouts, which, in turn, are superior to intersections without signalization.
本文研究了1994年至2000年间在佛兰德建造的环形交叉路口对道路安全的影响。虽然总体效果是积极的（伤害事故减少了39%），但其结果因主要道路和相邻道路的限速（限速越高，效果越显著）以及环形交叉路口前交叉路口的信号设置而有很大差异（有交通信号灯时减少32%，无交通信号灯时减少44%）。然而，微观分析表明，环形交叉路口并不总是有效。据估计，在环形交叉路口前设有信号的70公里/小时×50公里/小时交叉路口，重伤事故会增加117%。在原本设有信号的50公里/小时×50公里/小时交叉路口，涉及弱势道路使用者的伤害事故数量也有所增加（28%）。此外，弱势道路使用者更有可能受到致命或重伤。因此，得出的结论是，交通信号灯比环形交叉路口更有效地保护弱势道路使用者，而环形交叉路口又优于无信号的交叉路口。
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