UK Driving Theory Practice Exam

When is it permissible to cross double solid white lines?

1. When overtaking a faster vehicle

2. When overtaking a road maintenance vehicle travelling 10mph or less

3. When making a U-turn

4. When in a hurry

The correct answer is: When overtaking a road maintenance vehicle travelling 10mph or less

Crossing double solid white lines is permissible specifically when overtaking a road maintenance vehicle that is traveling at a speed of 10 mph or less. This allowance is in place to ensure safe passage when other vehicles are moving slowly due to maintenance work, and it recognizes that sometimes it is necessary to overtake such vehicles despite the solid line markings, which are usually in place to prevent dangerous maneuvers. Double solid white lines signify a restriction on overtaking and indicate that there is typically not enough visibility or space to execute a safe pass. However, the exception made for slow-moving road maintenance vehicles acknowledges the need for flexibility in specific scenarios where traffic flow could be impeded. This is designed to enhance safety while considering practical driving situations. The other options are not permissible because they do not align with the regulations governing solid white lines. Overtaking faster vehicles, making U-turns, or driving in a hurry do not justify crossing these lines, as they could lead to dangerous situations and compromise safety on the roads.