A procession of cars carrying VIPs, especially political figures.
JFK was assassinated in a motorcade.
The aide rides, along with the president's physician, in the “control car,” third in line in the motorcade.1994, Herbert L. Abrams, The President Has Been Shot: Confusion, Disability, and the 25th Amendment, Stanford University Press, →ISBN, page 126:
motorcade
verb
Etymology Blend of motor + cavalcade.
1
To travel in a motorcade.
We then motorcaded to our hotel to change into formal wear[…]2020 June 23, John Bolton, The Room Where It Happened: A White House Memoir, New York, N.Y.: Simon & Schuster, →ISBN, page 147: