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“I think a lot of people will be surprised,” said Bob Gibbens, 52, an air traffic controller from Houston who has attended the race for 44 years.

Boles said the parking passes should ease traffic backups and let police know who is inside the track with a vehicle. Police also will restrict access on a major route into the track and bar fans parked overnight in a lot across from the main gate from pouring through a tunnel into the track at dawn.

Marciani said he doesn’t think fans will be troubled by any extra hassle this year.

“The fans have changed a great deal in the last five years,” he said. “They know about Boston. The fans do. They’re going to be patient.”

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