Dario Chioda was in the announcer's booth at ceremonial when he learned McCartney was in the audience.
But he says McCartney motioned that he wanted to keep his visit quiet.
McCartney and Shevell began their journey from his holiday home in The Hamptons, New York on July 31th.
They picked up the old Route 66 in Illinois on their way to Santa Monica, California.
Slideshow archive | Local events | Contests | Headlines at a glance
