No single figure — but 20–30 km/h is the commonly cited range for urban/suburban routes.
| Factor | Impact |
|---|---|
| City | Taipei (dense, MRT competition) ~18 km/h; Kaohsiung ~22 km/h; rural ~35 km/h |
| Route Type | Express (highway) > Arterial > Local/feeder |
| Time of Day | Peak: 10–15 km/h; Off-peak: 25–40 km/h; Night: 30–45 km/h |
| Bus Type | Double-decker / articulated slower (dwell time); Standard faster |
| Priority Measures | Bus lanes, signal priority (BRT in Taichung, Chiayi) → +20–30% |
Taipei MRT avg ~35 km/h. Car (peak) ~15 km/h. Bus sits between — but losing riders to rail.