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

What our records show

The Long Island Expressway (I-495) runs through Riverhead 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 Riverhead 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 2 incidents on Long Island Expressway within Riverhead, including 2 critical cases. No fatalities have been recorded in the incidents we track for this stretch. The most recent report we published involved Man Indicted In LI Crash That Killed Nassau Officer After ‘Dangling Keys’ At Bar: DA on March 13, 2026. On average, we've seen roughly 0.3 reported crashes per month on this stretch during the period covered by our archive.

Inside Riverhead, Long Island Expressway intersects with or runs parallel to several other high-volume routes — LIE, Route 25 Jericho Turnpike — 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. Riverhead is home to about 33,422 residents and falls under Riverhead Town Police Department. Serious injuries from Long Island Expressway crashes are typically triaged to Peconic Bay Medical Center. Below you'll find every incident on this stretch we've covered, newest first.