The Montgomery County Department of Transportation has shut down one lane of Hillandale Road after part of the roadway buckled.

According to the Department’s Division of Highway Services, a storm drain culvert under the roadway was found to be degraded.

That led to an emergency pavement repair on Thursday. On Friday morning, the northbound lane of Hillandale Road starting at Little Falls Parkway was still closed.

A Montgomery County official was on site inspecting the damage.

The closure cuts off access to the Bethesda Swimming Pool (6300 Little Falls Parkway) and Willet Parkway from the south. Detour signage has been set up to direct drivers to northbound Arlington Road, eastbound Bradley Boulevard and then southbound Hillandale Road.