What is the correct hand signal for indicating that you are going to stop?

The correct hand signal for indicating that you are going to stop is to have your arm bent and pointing down. This signal is universally recognized among drivers and is crucial for ensuring that others on the road understand your intentions. When your arm is in this position, it clearly communicates to drivers behind you that you are slowing down or preparing to stop, thus helping to prevent accidents and maintain safety on the road.

The other choices do not effectively convey the message of stopping. An arm bent and pointed up typically indicates a right turn, while an arm straight out to the left signals a left turn. Waving your arm frantically in the air does not conform to standard hand signals and is likely to confuse other drivers rather than inform them. Therefore, using the correct hand signal for stopping is essential for clear communication and road safety.