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

What our records show

The Long Island Expressway (I-495) runs through Setauket 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 Setauket sitting along that spine. Locally, drivers know it as LIE or The Expressway or Interstate 495 or I-495.

Our database has logged 3 incidents on Long Island Expressway within Setauket, including 3 major cases. No fatalities have been recorded in the incidents we track for this stretch. The most recent report we published involved Setauket Teen Faces DWI Charges After LIE Crash Seriously Injures Woman on April 21, 2026. On average, we've seen roughly 3.0 reported crashes per month on this stretch during the period covered by our archive.

Inside Setauket, Long Island Expressway intersects with or runs parallel to several other high-volume routes — Route 25A, Nicolls Road, Old Town 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. Setauket is home to about 15,000 residents . Below you'll find every incident on this stretch we've covered, newest first.