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Question:

The hand and arm bent at 90 degrees and pointing downward indicates the driver's intention to

A slow down or stop.
Explaination

In Maryland, you may signal with either hand signals or your vehicle's signal lights. (Note: In some other states, you may use hand signals only if your vehicle's signal lights are not working. When traveling out of state, always check the local traffic laws.) For a right turn, the hand and arm are bent at 90 degrees and pointing up. For a left turn, the driver's hand and arm are extended straight out to the left. To slow down or stop, the hand and arm are bent at 90 degrees and pointing down.