WILMINGTON — The state Department of Transportation is planning to reduce a portion of state Route 86 between River Road (county Route 21) and Fox Farm Road (county Route 63) starting Monday.

The DOT plans to reduce the Notch to a single lane with alternating flows of traffic controlled by flaggers — on weekdays, between the hours of 6 a.m. and 5 p.m. — to facilitate drainage repairs. Work is anticipated to be completed by the end of October, weather permitting.

Once initial preparation work is completed, a traffic signal system will be installed to control the single alternating flow of traffic while work continues, according to the DOT.

Drivers should also watch for full closures of this stretch of Route 86 between River Road and the High Falls Gorge Cafe and Gift Shop for a few weeknights, between 8 p.m. and 6 a.m., in the coming weeks. The exact dates will depend upon the weather and pace of work.

During any overnight closures, traffic will be directed to a signed detour using state Route 73 in the towns of North Elba and Keene, Route 9N in the towns of Keene and Jay, and Route 86 in the towns of Jay and Wilmington.

Properties up to the closure point on Route 86 will remain accessible during these overnight closures.

The DOT asks drivers to obey flaggers’ directions when present, and slow down significantly whenever encountering roadside vehicles displaying red, white, blue, amber or green lights, including maintenance and construction vehicles in work zones.

Drivers are urged to slow down and drive responsibly in work zones. Fines are doubled for speeding in a work zone. Convictions of two or more speeding violations in a work zone could result in the suspension of an individual’s driver’s license.

For up-to-date travel information, call 511, visit www.511NY.org or download the free 511NY mobile app.