Question Topic: Road and traffic signs
Explanation: Road markings will warn you of a hazard ahead. A single broken line along the centre of the road, with long markings and short gaps, is a hazard warning line. Don't cross it unless you can see that the road is clear well ahead.
Category: Road and traffic signs
References: The Official DVSA Guide to Driving: Section 6, Highway Code: Rule 127, Highway Code: Page 114, Know Your Traffic Signs: Page 62