NEW YORK (CBSNewYork) — Turning the clocks forward not only wreaks havoc with our internal body clocks, it causes a spike in traffic accidents.

“It turns out Monday after daylight saving time is one of the deadliest days on the road,” “Gridlock Sam” Schwartz, a former New York City transportation commissioner, told WCBS 880’s Marla Diamond.

A study analyzing a decade’s worth of data from the Fatal Accident Reporting System showed a 17-percent increase in traffic fatalities on the Monday after clocks spring forward.