The 2018 United Airlines Rock N’ Roll Marathon will be back in the District Saturday, forcing street closures in virtually every section of the city.

The Metropolitan Police Department said there will be no vehicular traffic permitted on any routes of the marathon or half marathon events. Closures could begin as erly as 2 a.m. Runners will take off at 7 a.m. and streets should be back open by 3 p.m. Saturday, police said.

Police will allow some traffic to cross sections of the race course in a metered fashion, as long as a police officer is present.

Drivers should also expect parking restrictions along the entire routes.