“That should only help this year,” Boynton said.
Fans also have become accustomed to the traffic over the years and that’s helped.
“People have learned to come early and stay late,” Boynton said.
His advice to vacation travelers from Southern New Hampshire and Massachusetts is to be aware the race is happening Sunday and plan for it.
Later Sunday afternoon there will be a lot of vehicles heading south on I-93, he said.
“There will be higher volumes of traffic,” he said. “But I would be surprised if they run into complete congestion.”
Conditions won’t make this a big day for speeding.
Wagner’s advice: “Patience, absolute patience.”
People can get aggravated when it’s hot, trying to combat traffic, he said.
“Expect delays,” he said. “Expect the unexpected — accidents, breakdowns.”
Having participated in the traffic management through the years Wagner said driver inattention will cause those accidents.
“You’re in close quarters, tight quarters, in stop-and-go traffic,” he said. “You can come to a dead stop suddenly. Your focus needs to be on driving.”
Be prepared, too, Wagner advises.
“Make sure you have enough fuel in your car and that you have the basic necessities,” he said.
An observation from Boynton: “Auto racing is unique in that it is the only sporting event in which the spectators are doing the same activity in order to arrive at the event.”
To view the traffic management plan, visit the Department of Transportation’s website at nh.gov/dot.