短語詞組短語bus s priority signal 公共汽車優(yōu)先通行信號(hào)bus signal priority 公交信號(hào)優(yōu)先Bus Signal Priority Strategy 信號(hào)優(yōu)先策略arterial bus signal priority 交通走廊公交信號(hào)優(yōu)先 返回 bus priority signal