In what situation is it legal to drive in the shoulder lane?

Driving on the shoulder lane is permissible primarily during emergencies. This rule exists to ensure safety and allow vehicles to move out of the main flow of traffic when a sudden stop or hazard occurs. For instance, if a vehicle breaks down or if there is a medical emergency that requires immediate attention, using the shoulder can help you avoid collision or further complicating traffic conditions.

The shoulder is generally not intended for regular driving and can often have hazards like debris, pedestrians, or roadside repairs, which is why its use is limited to emergencies. In contrast, situations such as passing another vehicle, avoiding construction, or driving in congested traffic typically require adherence to the designated lanes to maintain orderly traffic flow and safety.