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

Brooklyn Residents: Keep Historic Wood Bridge For Pedestrians And Cyclists Only!

As the Department of Transportation is set to reopen the Carroll Street Bridge, locals want it to only reopen to pedestrians and cyclists.

March 17, 2026

Tuesday’s Headlines: We Love A Parade (For Pedestrians) Edition

Organizers of today's St. Patrick's Parade are telling everyone to leave their cars at home. Plus other news.

March 17, 2026

Mamdani Uses ‘Sammy’s Law’ To Reduce Speed Limits To 15 MPH At Schools, But Broader Implementation Is Stalled

By the end of this year, 800 more streets in front of public school buildings will get 15-mile-per-hour speed limits, bringing the citywide total to 1,300. It's a start.

Amazon Owes Nearly $10M Unpaid Fines for Idling in New York City

The online retail giant owes more than any other other company issued fines through the city's Citizens Air Complaint Program.

March 16, 2026

Mamdani Administration Wants To Allow A Brooklyn Hospital To Issue Parking Tickets

Could parking tickets be written by someone other than NYPD traffic agents and cops? Time will tell if this is a good idea or not.

March 16, 2026

Bus Companies Say There’s a Better Way to Take a ‘Great American Road Trip’ This Summer

As Americans start planning their summer vacations, the country’s largest inter-city bus operator is challenging them to leave their cars at home.

March 16, 2026
See all posts