When changing lanes on an unmarked roadway, are you exempt from signalling this manoeuvre with the appropriate turn signal?

In the video, you are driving along a wide street between brick tenement houses in a town; there are no lanes painted on the roadway, and a white van is parked on the right. When changing lanes where the lanes are not marked with road signs, you are not exempt from signalling this manoeuvre with your indicator. The answer is: no.

The Road Traffic Act requires the driver to signal with the indicator, in good time and clearly, the intention to change direction or lane, and to stop signalling immediately after completing the manoeuvre. The rule does not make this obligation depend on whether the lanes are painted: a lane is each of the longitudinal strips of the roadway wide enough for one line of vehicles, marked or not marked with road signs. If the roadway is wide enough to hold two lines of vehicles in one direction, moving sideways is a lane change just as on a roadway with lines - and in the same way you must give way to a vehicle travelling in the lane you are moving into. The lack of lines does not make the situation easier but harder, because the drivers behind you have no reference point and only your indicator tells them what you intend to do. So you signal in good time, check the mirror and the blind spot, and change your path smoothly.

Legal basis: Art. 22 para. 4 and 5 and Art. 2 point 7 of the Road Traffic Act (Prawo o ruchu drogowym)