What Happened
A crash on westbound NY 347 in Suffolk County closed two right lanes on Monday, August 3, 2026, prompting a major-severity incident designation from traffic authorities. The lane closures were confirmed in official incident data, though police have not yet released details on the number of vehicles involved, the cause of the collision, or whether any injuries were sustained.
The closure affected the right two lanes of the westbound carriageway, a configuration that typically forces through traffic to merge left and creates significant queue buildup on one of the busiest surface roads on Long Island’s North Shore. The time of the crash has not been confirmed in available records.
No additional information on the parties involved — including vehicle types, driver identities, or the sequence of events leading to the collision — has been released in the official record available at this time.
Location & Road Context
NY 347, also known as Terry Road and Nesconset Highway depending on the segment, runs east-west through the heart of northern Suffolk County, connecting communities from Hauppauge and Smithtown through Port Jefferson Station. It serves as a primary arterial for commuters, commercial vehicles, and local traffic alike, with high volumes at most hours of the day. You can find more information about this road on our NY 347 road page.
According to Long Island Traffic’s incident database, NY 347 has logged 54 recorded incidents, making it one of the more crash-prone surface routes tracked in Suffolk County. The corridor has seen a particularly active stretch recently: in addition to Monday’s crash, another incident was recorded on NY 347 on August 1, and multiple construction-related entries — covering drainage improvements, repaving, traffic signal repairs, and utility work — appeared on July 20 and July 27. Intersection improvement work was also logged on July 12. The combination of active lane reductions from construction and a major crash closure on August 3 likely compounded westbound congestion. Suffolk County as a whole has accumulated 706 recorded accidents in our local database.
Broader Impact
Monday’s closure arrived during a difficult stretch of road safety across Suffolk County. Just two days earlier, on August 1, 2026, two separate critical-severity motorcycle fatality incidents were recorded in the county — a stark reminder of the risks on Long Island’s busy surface and highway network heading into the peak of summer. A minor crash on I-495 was also reported the same day as the NY 347 incident, adding to the regional traffic load. Motorists on the North Shore are advised to check real-time conditions before traveling westbound on NY 347 and to consider alternate routes via Jericho Turnpike (NY 25) or the Long Island Expressway depending on their destination.