What does this sign mean?

Explanation: This type of sign warns you of hazards ahead. Make sure you look at each sign and road marking that you pass, so that you don't miss any vital instructions or information. This particular sign shows there's a T-junction with priority over vehicles from the right.

Category: Road and traffic signs

References: The Official DVSA Guide to Driving: Section 6, Highway Code: Page 108, Know Your Traffic Signs: Page 10