lead car; leading car
A vehicle that drives ahead to guide others, such as in a convoy, race, or funeral procession.
先導車がパレードの先頭を走った。
The lead car drove at the front of the parade.
葬儀では先導車の後ろに霊柩車が続く。
In a funeral, the hearse follows behind the lead car.
Compound of 先導 (sendō, 'guidance, leading') + 車 (sha, 'vehicle').