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

What our records show

The Long Island Expressway (I-495) runs through Stony Brook 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 Stony Brook 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 Stony Brook, including 1 critical, 1 major cases. No fatalities have been recorded in the incidents we track for this stretch. The most recent report we published involved Teen Driver Faces DWI Charges After LIE Crash Leaves Stony Brook Passenger With Serious Injuries on April 17, 2026. On average, we've seen roughly 0.5 reported crashes per month on this stretch during the period covered by our archive.

Inside Stony Brook, Long Island Expressway intersects with or runs parallel to several other high-volume routes — Route 25A, Nicolls Road, Stony Brook Road — 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. Stony Brook is home to about 14,000 residents and falls under SCPD 4th Precinct. Serious injuries from Long Island Expressway crashes are typically triaged to Stony Brook University Hospital. Below you'll find every incident on this stretch we've covered, newest first.