priority to boarding/alighting passengers
Used on signs and in traffic regulations to indicate that vehicles must yield to passengers getting on or off public transport, especially at stops.
Near the bus stop, there is a sign that says 'priority to boarding/alighting passengers'.
General term for priority or precedence; 乗降車優先 is a specific compound used in traffic contexts.
Compound of 乗降車 (じょうこうしゃ, 'boarding and alighting from vehicles') and 優先 (ゆうせん, 'priority').