Final answer:
When turning right, vehicles should stay as close as possible to the right side of the road to allow other vehicles to pass on the left, maintain traffic flow, and ensure the safety of pedestrians and bicyclists.
Step-by-step explanation:
When turning right, vehicles should stay as close as possible to the right side of the road. This is known as keeping to the right or hugging the curb.
By staying close to the right side of the road, vehicles allow other vehicles to pass on their left and prevent blocking or impeding the flow of traffic. Additionally, staying as close as possible to the right side of the road helps maintain a safe distance from pedestrians and bicyclists.