You are driving on the motorway in a motor vehicle with a gross vehicle weight rating in excess of 7.5 t. The heavy snowfall has reduced visibility to less than 50 m. What must you do?

You answered correctly. In heavy snowfall with visibility less than 50 meters, vehicles over 7.5 tons on the motorway must not use the far left lane, and the maximum permitted speed is 50 km/h. This is a safety regulation to reduce the risk of accidents in severe visibility conditions. There is no requirement to leave the motorway at the next exit; you only need to reduce your speed and stay out of the left-most lane. Always remember these specific rules for large vehicles in poor visibility to keep yourself and others safe.