You are driving on a dual carriageway and see this road marking: a long continuous (solid) white line separating your lane from the lane on your right, with a broken white line on the far side of it (in the right-hand lane). A slower vehicle is ahead of you in your lane. What does this road marking mean for you?

Explanation

A solid white line on your side of the centre marking means you must not cross or straddle it except in very limited circumstances (for example, to enter premises or pass a stationary obstruction). Even if the line on the far side is broken, only traffic on the broken-line side may cross to overtake when it is safe and legal. Under Rule 267 of the Highway Code, you must only overtake when it is safe and legal to do so, and only on the right. In this situation, it is illegal and unsafe for you to cross the solid white line to overtake, so you must stay in your lane and not attempt the manoeuvre.