When is it acceptable to have just one hand on the steering wheel?

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Keeping control of the vehicle is the priority. It’s acceptable to have one hand on the wheel briefly when you need to adjust driving controls, such as the radio, climate controls, or a navigation screen, as long as you can still steer smoothly and you return both hands to the wheel as soon as the adjustment is done. These tasks usually require minimal steering input, and you should be at a safe speed with your eyes and attention on the road. If possible, plan adjustments when you’re stopped or at a safe moment in light traffic, and avoid prolonged one-handed steering. The other options don’t fit because constant or turning-required driving needs full control, and the idea isn’t to rule out all one-handed moments—brief adjustments are a normal exception.