In California, you may NOT stop at a _______ curb to pick up or drop off passengers.

Explanation

California has an extensive set of rules on painted colored curbs. A green curb indicates that you may park there for the time posted. A yellow curb is like a No Parking sign; it means that you may stop there only momentarily to pick up or drop off passengers or cargo. A white curb is like a No Standing sign; it means that you may stop there only momentarily to pick up or drop off passengers but not cargo. A red curb is like a No Stopping sign; it means that you may not stop there for any reason other than to obey another traffic rule. Finally, a blue curb indicates that only persons who have a disabled placard or disabled license plate may park there.