CONCORD, N.C. -- The green flag dropped Friday night to start a week of heavy traffic around the Charlotte Motor Speedway.
Friday night featured the Truck Series race and Saturday night's feature attraction is The Sprint All-Star race.
As many as 150,000 additional vehicles are expected to be around the speedway this week during the run up to next weekend's Coca-Cola 600.
All those vehicles are going to find Interstate 85 under construction near the speedway -- meaning there are only two lanes open in each direction and no breakdown lanes on either side.
As he arrived at the track Friday night, Brandon Boger said of his ride in, "In Salisbury it slowed down a little and down in Concord it slowed some more, but not tremendously."
Most of those headed to the track on the first night said they had few, if any, problems.
"Not bad at all," said David Thomas.
The North Carolina Department of Transportation has extra trucks in position along I-85 to quickly move any vehicles that break down or are involved in accidents.
The DOT is monitoring traffic from a control center.
"We watch for problems. We look for issues. We watch for things that happen at one intersection that affect another intersection adjacent," said the DOT's Scott Cole.
Instead of using I-85, the DOT suggests using Routes 29 and 49, especially coming from the north.
The DOT will limit work to overnight hours until next Wednesday, when all work -- day and night -- will be suspended until after Memorial Day.