Which sign indicates you must proceed straight ahead only?

• A. Ahead only
• B. Turn left ahead
• C. Turn right ahead
• D. Roundabout ahead

Answer: (A)

You must continue straight ahead. Signs that say “Ahead only” regulate your path, telling you that turning left or right is not permitted at this point, so you keep going straight. This is used where the road layout requires you to go straight, such as at the end of a one-way approach or where turning would be unsafe or illegal.

The other signs indicate different instructions: a sign that says you can turn left ahead means a left turn is allowed or required; a sign that says you can turn right ahead means a right turn is allowed or required; and a roundabout ahead sign warns you that you’ll approach a roundabout and should prepare to yield and take the roundabout in the usual manner.