If you see this sign, you: Question If you see this sign, you: Answers Must not pass another vehicle. May pass a slow-moving vehicle if you can do so quickly. May pass if you know the road ahead. May pass, but only at night. Explanation Regulatory signs are white, rectangular signs with black markings. Drivers must obey the instructions posted on all regulatory signs. Where this sign is posted, it is prohibited for drivers to pass one another.
