Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question This sign means: Answers Minimum speed limit is 40 mph. No turn on red. Fines double in work zone. Added lane. Explanation Regulation signs regulate traffic speed and movement, displaying rules which drivers must obey. This sign indicates a minimum legal driving speed and drivers should not drive below the speed posted. Take a FREE Practice Test Now This questions appears in the following tests: Indiana Practice Test