TABLE 2—

Roadway Crashes Before and After Installation of Bicycle Lanes, by Group: New York City, 1996–2006

	Before Period (5 Years)		After Period (2 Years)
Crash Type	Total	Averagea	Total	Averagea	Change,b %
Crashes on segments
Total
Treatment group	827	0.2857	209	0.1805	−36.8
Comparison group	2164	0.2247	537	0.1394	−38.0
Vehicle crashes
Treatment group	559	0.1931	137	0.1183	−38.7
Comparison group	1511	0.1569	367	0.0953	−39.3
Pedestrian crashes
Treatment group	175	0.0604	43	0.0371	−38.6
Comparison group	446	0.0463	118	0.0306	−33.9
Bicycle crashes
Treatment group	47	0.0162	19	0.0164	1.2
Comparison group	112	0.0116	25	0.0065	−44.0
Injurious or fatal crashes
Treatment group	612	0.2114	153	0.1321	−37.5
Comparison group	1504	0.1562	363	0.0942	−39.7
Crashes at intersections
Total
Treatment group	4577	1.5837	1494	1.2924	−18.4
Comparison group	13 450	1.6273	4124	1.2474	−23.3
Vehicle crashes
Treatment group	3358	1.1619	969	0.8382	−27.9
Comparison group	10 199	1.234	2925	0.8848	−28.3
Pedestrian crashes
Treatment group	767	0.2654	333	0.2881	8.6
Comparison group	2213	0.2678	843	0.2550	−4.8
Bicycle crashes
Treatment group	317	0.1097	155	0.1341	22.2
Comparison group	680	0.0823	244	0.0738	−10.3
Injurious or fatal crashes
Treatment group	3748	1.2969	1196	1.0346	−20.2
Comparison group	10 861	1.3174	3215	0.9725	−26.2

Note. The treatment group consisted of roadway segments in New York City where bicycle lanes had been installed from 1996–2006. The comparison group comprised locations without bicycle lanes but with segment- or intersection-level characteristics comparable to those of the treatment group.

^aAverage number of crashes per location per year.

^bChange in average number of crashes.