Final answer:
Never make a U-turn at a location marked with a No U-turn sign. The correct option is 3.
Step-by-step explanation:
This sign is specifically designed to indicate that U-turns are prohibited due to safety concerns, such as limited visibility, high traffic speeds, or other hazardous conditions. Making a U-turn where it is not allowed can lead to dangerous situations and potentially cause traffic accidents. Instead, drivers should look for an alternative route or a designated area where U-turns are permitted and safe to execute.
For example, at an intersection with a traffic signal, while you may be inclined to use the signal as a cue to execute a U-turn when the light is green, doing so may still be illegal if a No U-turn sign is posted. Similarly, while a stop sign requires drivers to halt, it doesn’t necessarily indicate that a U-turn is permissible in that location. Hence, 3 is the correct option.