motorcade
n.a group of vehicles that travel together, usually to protect or follow a very important person. You often see these when a leader or celebrity is moving through a city.
n.a procession of vehicles, typically motor vehicles, traveling together for the purpose of escorting or protecting a person of high status. Often used in the context of political or celebrity security.
“The motorcade arrived at the hotel in the middle of the night.”
“A large motorcade of black SUVs and police cars escorted the president through the crowded city streets.”
“The security detail was extensive, with a motorcade stretching for several blocks to ensure the dignitary's safety during the high-profile international summit.”
Blend of motor + cavalcade.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.