Long Island Expressway (I-495) accidents in Deer Park, NY

What our records show

The Long Island Expressway (I-495) runs through Deer Park as one of the 66-mile primary expressways serving Suffolk County, carrying roughly 200,000 vehicles per day. The posted speed limit is 55 mph (50 mph in Queens). The route stretches from Queens Midtown Tunnel (Manhattan) to County Route 58 (CR 58), Calverton / Riverhead (Suffolk County), with Deer Park sitting along that spine. Locally, drivers know it as LIE or L.I.E or LIE highway or L.I.E highway or The Expressway or Interstate 495 or I-495 or 495 or 495 highway or Route 495.

Our database has logged 5 incidents on Long Island Expressway within Deer Park, including 3 moderate cases. No fatalities have been recorded in the incidents we track for this stretch. The most recent report we published involved Left Lane Closed on I-495 Eastbound in Suffolk County After Midday Crash on July 16, 2026. On average, we've seen roughly 2.5 reported crashes per month on this stretch during the period covered by our archive.

Inside Deer Park, Long Island Expressway intersects with or runs parallel to several other high-volume routes — Sagtikos State Parkway, Deer Park Avenue, Grand Boulevard — so many crashes on this corridor originate at exits and interchanges rather than along open stretches. That pattern matches what we see in the incident reports below, which cluster around entry and exit ramps feeding those surface streets.

Town context matters because accidents here don't unfold in isolation. Deer Park is home to about 28,000 residents . Below you'll find every incident on this stretch we've covered, newest first.