Contraflows and cycling safety: Evidence from 22 years of data involving 508 one-way streets.
Contraflows and cycling safety: Evidence from 22 years of data involving 508 one-way streets.
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逆流和骑行安全：来自 22 年涉及 508 条单向街道的数据的证据。
DOI：
10.1016/j.aap.2022.106895
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Tait C
中科院分区：
文献类型：
--
作者：
Tait C
在单行道上逆流骑行是一种低成本的干预措施，研究表明它可以改善骑行体验并增加参与率。几项研究的证据表明，在车流中骑自行车的人撞车的风险较低。然而，实施逆流循环经常引起争议，包括在英国（UK）。在本文中，我们研究是否逆流骑自行车在单行道改变碰撞或伤亡率骑自行车的人。以1998年至2019年的伦敦内城区为研究对象，我们确定了508条在单行道上引入逆流自行车的路段。我们确定了在这些路段10米范围内发生的道路交通碰撞，并将其标记为前逆流、逆流或消除逆流的碰撞。我们使用崩溃或伤亡人数除以暴露时间来计算比率，并使用自举重采样生成95%的置信区间。我们调整了警戒线循环量和损伤严重程度报告的变化率。有1498宗涉及骑单车人士的交通意外，其中788宗是在违流车流前发生，703宗是在违流车流清拆后发生，7宗则是在违流车流清拆后发生。当引入逆流骑行时，调整后的整体骑自行车者碰撞或伤亡率没有变化。靠近交叉路口使撞车率增加了一倍。骑自行车的人在车流中行驶时的撞车率与车流中行驶时的撞车率相同。我们没有发现任何证据表明引入逆流自行车会增加骑自行车者的撞车或伤亡率。如果能获得更准确的时空循环量数据，引入对流循环后，这种速率可能确实会下降。我们建议对所有单行道进行逆向骑行评估，但鼓励明智的交叉口设计，并建议英国立法修改单行道上强制性的双向骑行，除非特殊情况存在。
Contraflow cycling on one-way streets is a low cost intervention that research shows can improve the cycling experience and increase participation. Evidence from several studies suggest that cyclists on contraflows have a lower crash risk. However, implementing contraflow cycling is often controversial, including in the United Kingdom (UK). In this paper we examine whether contraflow cycling on one-way streets alters crash or casualty rates for pedal cyclists.Focusing on inner London boroughs between 1998 and 2019, we identified 508 road segments where contraflow cycling was introduced on one-way streets. We identified road traffic crashes occurring within 10 m of these segments and labelled them as pre-contraflow, contraflow or contraflow removed crashes. We calculated rates using the number of crashes or casualties divided by the time exposed and generated 95 % confidence intervals using bootstrap resampling. We adjusted the rates for changes in cordon cycling volume and injury severity reporting.There were 1498 crashes involving pedal cyclists: 788 pre-contraflow, 703 contraflow and 7 following contraflow removal. There was no change in adjusted overall pedal cyclist crash or casualty rates when contraflow cycling was introduced. Proximity to a junction doubled the crash rate. The crash rate when pedal cyclists were travelling contraflow was the same as those travelling with flow.We have found no evidence that introducing contraflow cycling increases the crash or casualty rate for pedal cyclists. It is possible that such rates may indeed fall when contraflow cycling is introduced if more accurate spatio-temporal cycling volume data was available. We recommend all one-way streets are evaluated for contraflow cycling but encourage judicious junction design and recommend UK legislative change for mandatory-two-way cycling on one-way streets unless exceptional circumstances exist.