Question A curb painted blue means parking is: Answers Allowed for no longer than 15 minutes. Only allowed when picking up or dropping off passengers. For disabled persons with a special placard or plate. Explanation A blue curb indicates an area where parking is permitted only for a disabled person, or driver of a disabled person, who displays a placard or special license plate for disabled persons or disabled veterans. Take a FREE Practice Test Now This questions appears in the following tests: California Practice Test