Explanation: You may cross the solid white line to pass a stationary vehicle or to pass a pedal cycle, horse or road maintenance vehicle if it's travelling at 10 mph or less. You may also cross the solid white line to enter a side road or access a property.
Category: Road and traffic signs
References: The Official DVSA Guide to Driving: Section 6, Highway Code: Rule 129, Highway Code: Page 114, Know Your Traffic Signs: Page 64