Bus signals (or B-signals) can be applied at a traffic signal where a bus lane is provided. The white B-signal activates when the presence of a bus is detected in the bus lane, providing it with a head start over traffic.
Where a bus lane ends before the intersection and the bus shares a lane with a turning movement (typically a left turn), a left turn arrow can operate in conjunction with the B-signal to clear any traffic queued ahead of the bus.
Advantages of B-signals
- Reduces corridor time for buses.
- Increases traffic flow, in conjunction with bus lanes.
- Merges traffic streams efficiently and safely.