Insurance Institute for Highway Safety, 1005 North Glebe Road, Arlington, VA, USA.
Insurance Institute for Highway Safety, 1005 North Glebe Road, Arlington, VA, USA.
J Safety Res. 2014 Feb;48:57-62. doi: 10.1016/j.jsr.2013.12.001. Epub 2013 Dec 15.
In June 2010, Arlington County, Virginia, installed red light cameras at four heavily traveled signalized intersections. Effects of camera enforcement on red light violations were examined.
Traffic was videotaped during the 1-month warning period and 1month and 1year after ticketing began at the four camera intersections, four non-camera "spillover" intersections in Arlington County (two on travel corridors with camera intersections, two on different corridors), and four non-camera "control" intersections in adjacent Fairfax County. Logistic regression models estimated changes in the likelihood of violations at camera and spillover intersections, relative to expected likelihood without cameras, based on changes at control intersections.
At camera intersections, there were significant reductions 1year after ticketing in odds of violations occurring at least 0.5s (39%) and at least 1.5s (86%) after lights turned red, relative to expected odds without cameras, and a marginally significant 48% reduction in violations occurring at least 1s into red. At non-camera intersections on corridors with camera intersections, odds of violations occurring at least 0.5s (14%), 1s (25%), and 1.5s (63%) into the red phase declined compared with expected odds, but not significantly. Odds of violations increased at the non-camera intersections located on other Arlington County travel corridors.
Consistent with prior research, red light violations at camera-enforced intersections declined significantly. Reductions were greater the longer after the light turned red, when violations are more likely to cause crashes. Spillover benefits were observed only for nearby intersections on travel corridors with cameras and were not always significant.
This evaluation examined the first year of Arlington County's red light camera program, which was modest in scope and without ongoing publicity. A larger, more widely publicized program is likely needed to achieve community-wide effects.
2010 年 6 月，弗吉尼亚州阿灵顿县在四个交通繁忙的有信号控制的路口安装了闯红灯摄像头。本研究旨在检验闯红灯摄像执法对闯红灯行为的影响。
在四个安装摄像头路口的警示期和执法启动后的 1 个月及 1 年，以及阿灵顿县的四个非摄像头“溢出”路口（两个在有摄像头路口的交通走廊上，两个在不同的走廊上）和四个相邻费尔法克斯县的非摄像头“对照”路口，对交通进行了视频拍摄。采用逻辑回归模型，根据对照路口的变化，估计了摄像头和溢出路口相对于无摄像头情况下违规发生的可能性变化。
在执法启动 1 年后，与无摄像头情况下的预期几率相比，在摄像头路口，红灯亮起至少 0.5s（39%）和至少 1.5s（86%）后发生违规的几率显著降低，红灯亮起至少 1s 后发生违规的几率降低了 48%（具有边缘显著意义）。在与有摄像头路口的交通走廊上的非摄像头路口，红灯亮起至少 0.5s（14%）、1s（25%）和 1.5s（63%）后发生违规的几率与预期几率相比有所下降，但无显著差异。位于阿灵顿县其他交通走廊上的非摄像头路口的违规几率则有所增加。
与先前的研究一致，摄像头执法路口的闯红灯行为显著减少。红灯变绿后时间越长，违规越有可能导致撞车，因此减少的幅度越大。仅在有摄像头的交通走廊上的附近路口观察到溢出效应，且并不总是显著。
本评估研究了阿灵顿县闯红灯摄像计划的第一年，该计划规模较小且没有持续宣传。需要一个更大、更广泛宣传的计划才能实现整个社区的效果。
