Crews are working around the clock to get ready for this weekend’s Grand Prix of Houston.

Workers have only a few days to transform Reliant Park into a Grand Prix racetrack.

The moment the Houston Texans finished their game against the Seattle Seahawks, crews began tackling the track. It’s a project that usually takes four weeks, but it will have to be completed in three days.

In the middle of the night workers started setting up the bleachers that will seat an estimated 150,000 fans expected to be at Reliant for the three-day event.

More than 50 construction vendors and 500 workers are laying the 1.7 mile track, which includes 10 turns.

More than 11,000 new car tires will serve as soft barriers. There are four crosswalk bridges, 18 miles of cable, and 2,000 concrete barrier walls, which totals about 17 million pounds of concrete.

The first race begins at 8 a.m. Friday. The event runs through Sunday.

Ticket prices range, but general admission seating starts at $10 for.

Click here for more event information.