In a built-up area your autobus signals to leave a stop. What should other drivers do, and what remains your duty?

1. Other drivers may accelerate to close the gap; you then wait for the next gap only
2. You may pull out without looking because built-up bus-stop rules give absolute priority
3. You may open the doors again while rolling to speed up boarding of late passengers
4. Other drivers should slow and allow you to rejoin when safe; you must still check doors, mirrors and blind spots before moving