Outside a built-up area, the vehicle ahead in your lane signals an intention to overtake on the same side as you, but does not start after a reasonable time. May you overtake it?

Correct answer

Yes, after warning its driver, if overtaking is permitted and can be completed safely.

Yes, if you warn its driver and all other safety and legal conditions are met. Article 84.2 initially gives priority to the preceding vehicle signalling that intention; if it does not exercise it after a reasonable time, you may overtake after an audible or visual warning. Outside a built-up area, the horn may warn of overtaking, or brief light flashes may be used without dazzling. The indicator signals your lateral movement but does not by itself replace that warning. Also check that nobody behind has already begun overtaking and that you can return safely.