Skip to Content
Streetsblog New York City home
Streetsblog New York City home
Log In
John Liu

Liu’s Office Outlines Benefits of Investigating All Serious NYC Traffic Crashes

John Liu's office recently published a brief analysis of the newly-expanded NYPD Collision Investigation Squad. Liu has already proposed increasing the number of NYPD crash investigators, and now Doug Giuliano, senior policy analyst for the comptroller's office, has put up some more numbers that illustrate how woefully inadequate CIS staffing is.

With 19 investigators, in 2011 the AIS investigated 304 of the 3,192 fatal or serious collisions, for a rate of 16 cases per investigator. At this rate, the AIS would have been only able to review an average of eight percent of the average 3,629 cases per year. With the addition of 10 investigators, the CIS can now review about 13 percent of serious and fatal incidents -- an improvement, but still not enough.

To investigate an average of 3,629 serious and fatal accidents each year, the NYPD would need 227 investigators.

Giuliano estimates that it would cost about $12 million to hire 198 additional crash investigators, enough to "review every fatal or serious injury crash." That figure does not include overtime and other costs associated with an increase in staffing levels, nor does it take into account the potential benefits of investigating all serious crashes. The city could save millions in civil payouts if more evidence were gathered from crash sites, Giuliano says, and more crash site data could be used to improve safety.

"Finally, and most important, more than 13 percent of victims and their families deserve to know the circumstances of fatal and serious crashes," writes Giuliano. "Expanding the CIS would not only bring peace of mind, but also the evidence necessary to secure justice."

Stay in touch

Sign up for our free newsletter

More from Streetsblog New York City

Andy Byford’s ‘Trump Card’ On Penn Station Keeps Wrecking New York’s Infrastructure Projects

What will become of the Amtrak executive's plans for Penn Station under President Trump?

February 6, 2026

FLASHBACK: What Happened To Car-Free ‘Snow Routes’ — And Could They Have Helped City Clear the Streets?

Remember those bright red signs that banned parking from snow emergency routes? Here is the curious story of how New York City abandoned a key component of its snow removal system.

February 6, 2026

Council Transportation Chair Vows To Take On Drivers: ‘I Don’t Want To Just Futz Around the Edges’

Streetsblog grilled new chairman Shaun Abreu, who says he wants to bring more life and fewer cars to the street.

February 6, 2026

Friday’s Headlines: New York’s Strongest Edition

It's still snow problem around town. Plus other news.

February 6, 2026

Budget Crunch: Advocates Push Mamdani For Massive Fair Fares Expansion

The expansion would offer free transit on the subway and bus for people making up to 150 percent of the federal poverty level, which is not a lot.

February 5, 2026
See all posts