When a love of auto racing meets a love of ham radio, you get the W9IMS annual special event station for the Indianapolis 500. They actually offer a certificate if you work all three races there.
Grand Prix - May 8 to 14 (Starts Sunday!)
Indy 500 - May 23-29 (You know, Memorial Day Weekend)
NASCAR race - July 25-31
It’s all voice simplex operations. More info: W9IMS - Callsign Lookup by QRZ Ham Radio