Which sign must you obey?
A)The one that prohibits parking, as it is the most restrictive.
B)The one that prohibits parking, as it is the least restrictive.
C)The one that prohibits stopping and parking, as it is more restrictive.Correct
In the event that two signs from the same group — in this case vertical signs — contradict each other, you must always obey the more restrictive one. In the situation shown in the image, you must obey the no stopping and no parking sign, as it is more restrictive than the no parking sign.