What is the rule in built-up areas when a route-based bus or trolleybus signals its intention to pull out from a designated stopping place?

1. The bus must always wait until all traffic has passed.
2. Drivers in the adjacent lane must yield right-of-way to the bus or trolleybus starting from its designated stop.
3. Drivers should accelerate to overtake the bus before it merges.
4. Yielding is only required during peak rush hours.