MD 355 signClosure and Detour Necessary for a Highway Drainage Project (May 31, 2023) –The Maryland Department of Transportation State Highway Administration will temporarily close the ramp from northbound MD 355 (Rockville Pike) to the outer loop (westbound) I-495 (Capital Beltway) for several hours a day next week to complete a drainage project. Work will start Monday, June 5, and will be completed by Friday, June 9, weather permitting.The ramps will be closed weekdays between 9 a.m. and 3 p.m. During the work, motorists can expect to be detoured using Grosvenor Lane to Cheshire Drive to MD 187 (Old Georgetown Road) and back to the outer loop of I-495. The detour length is approximately 1.7 miles. The State Highway Administration understands lane closures can be an inconvenience, but the work is necessary to ensure a safe and reliable transportation system. Motorists are asked to reduce speeds approaching and while in active work zones.Customers who have questions may contact the District 3 Office at 301-513-7300 or toll-free at 1-800-749-0737. For a list of all major State Highway Administration projects, go to Project Portal, or visit the homepage at roads.maryland.gov. For a look at real-time traffic conditions, go to md511.maryland.gov.