Final answer:
U-Turns are typically prohibited on highways and ramps to prevent dangerous situations and ensure the flow of high-speed traffic. Drivers must use designated exits or areas to change direction.
Step-by-step explanation:
The question is asking about traffic rules related to turns and overtaking on a highway or ramp. In this context, U-Turns are typically not allowed on highways or entrance/exit ramps for safety reasons, as they can be dangerous due to the high-speed nature of highway traffic. Making a U-Turn would involve crossing opposing lanes of traffic, which is typically prohibited. Instead, highways have designated areas or exits that drivers can use to change direction if necessary.