A diamond symbol painted in a freeway lane and HOV or carpool signs indicate that lane is:

A.Open to any single driver at all times
B.A parking lane for carpools
C.Reserved during posted times for vehicles meeting the posted occupancy or vehicle rules
D.For motorcycles only in every case

Correct answer

C. Reserved during posted times for vehicles meeting the posted occupancy or vehicle rules

Why

HOV lanes use a diamond marking and signs stating who may use them and when. Enter only if your vehicle qualifies and only at permitted entry points.

Manual topic: California Driver Handbook - Lane Use · From the California Learner's Permit (Car) practice bank (CAC-075).