The Brooklyn half marathon will hit the streets of New York this weekend, sending runners on a 13-mile route that starts near the Brooklyn Museum at 7 a.m. Saturday and finishes on the Coney Island Boardwalk. The field will move through Prospect Park and down to Coney Island as Brooklyn braces for a day of race traffic and street changes.

Parking restrictions begin as early as 6 a.m. Thursday and will stay in place through the race, with no parking allowed on parts of Eastern Parkway, Flatbush Avenue, Ocean Avenue and near the boardwalk. For drivers in Brooklyn, that means the event reaches beyond the runners themselves and into the neighborhoods along the course before the first mile is even run.

The route through Prospect Park and toward Coney Island is the familiar spine of the event, but the impact starts earlier for anyone trying to move around the borough. Saturday’s start time leaves little room for a slow morning in the areas near the Brooklyn Museum, and the boardwalk finish will bring the race to one of the city’s busiest waterfront stretches.

That split between a morning race and a longer buildup is what makes this weekend matter today: the course is set, the restrictions are in motion, and Brooklyn drivers have to plan around both. By Saturday morning, the half marathon will be underway; by then, the bigger question for many residents will already have been how to get where they were going without running into the race.