What Happened
The New York State Department of Transportation is warning drivers of an overnight closure of westbound Sunrise Highway (State Route 27) at Exit 50A (Johnson Avenue) in the Town of Islip, Suffolk County, beginning at 10 p.m. on Tuesday, August 11, 2026, and lasting until 5 a.m. Wednesday morning. According to a travel advisory published by LongIsland.com, the closure is necessary to facilitate the removal of an overhead sign structure at that location.
Motorists traveling westbound on Sunrise Highway who encounter the closure will be detoured onto the North Service Road for approximately one mile before being able to re-enter the highway and continue their westbound journey. The NYSDOT advisory emphasizes that all construction activities are weather dependent and subject to change based on conditions, so drivers should expect the possibility of a modified timeline.
The work is scheduled to take place entirely during overnight hours, minimizing disruption to daytime commuters. Drivers heading westbound through Islip late Tuesday night or in the early hours of Wednesday morning should plan alternate routes or allow extra travel time if they need to pass through that corridor.
For real-time updates on this and any other changes to the closure window, the NYSDOT recommends calling 511, visiting www.511NY.org, or downloading the free 511NY mobile app.
Location & Road Context
Exit 50A at Johnson Avenue sits along one of Long Island’s most heavily traveled east-west arterials. Sunrise Highway serves as a primary commuter and commercial corridor through Suffolk County, connecting communities across the South Shore. Our incident database records 1,336 incidents on this roadway, underscoring how any disruption — even a planned, single-night closure — has the potential to affect a significant volume of traffic. Recent activity on the corridor includes additional roadwork and construction on NY 27 logged as recently as August 10–11, 2026, suggesting an active period of infrastructure maintenance in this stretch.
Suffolk County as a whole has 748 recorded accidents in our local database, and the Islip area has seen several notable recent incidents, including a crash on NY 27 on August 10 and a critical fatal crash in Nesconset the same day, reinforcing the importance of careful navigation around any active construction zone on Long Island roadways.
Broader Impact
The NYSDOT’s decision to schedule the overhead sign structure removal during overnight hours reflects standard practice for high-volume highways — limiting peak-hour impact while giving crews the time and space needed to safely perform elevated work. As the agency itself notes, lives are on the line around highway workers: drivers approaching any active work zone, including the North Service Road detour, should reduce speed and remain alert. Motorists seeking the latest travel conditions can also follow the NYSDOT Long Island region on X or visit the department’s official website for corridor-specific updates as the work night progresses.