Parking spaces downtown will be in high demand Thursday as workers compete with the thousands of attendees of the Get Motivated seminar at the Van Andel Arena.

City parking officials say traffic could be a problem if more than 15,000 persons attending the “Get Motivated” seminar at the Van Andel Arena compete for parking spaces with downtown's weekday commuters.

“The influx of vehicles in Grand Rapids for this event is greater than the available parking options,” said Pam Ritsema, managing director of the city's Parking Services Department.

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Free parking and free shuttle service will be available at the Delta Plex and FifthThird Ball Park.  Free shuttles will begin operating from the DeltaPlex and Fifth Third Ball Park at 6 a.m. and run until 6 p.m..

The Get Motivated seminar will feature former New York Mayor Rudi Guiliani, General Colin Powell, f NFL Hall of Fame quarterback Terry Bradshaw and former Notre Dame football coach Lou Holtz.  The event ends at 5 p.m..