Tell you one CARPOOL comment in French?

Native speakers! (Or any other person in good French) How do you say carpool in French I can not find it anywhere! Please help, tomorrow's date back one is my project !!!!!!!

"Carpool" or "carpool" (n.) "carpool" or "co-coaches (verb.) [I would like to avoid using the word in French] you can find more info. for your project in the link below Do not panic!

NANTUCKET, MA- Memorial Service for Missing Boater Jon Hemingway (03-26-10)