Accident Severity 事故嚴(yán)重度

　Accident-severity ratio 肇事嚴(yán)重性比率

　Accumulate vehicle-second 累計(jì)車—秒數(shù)

　Accuracy 精度

　Acoustic absorptivity ACI 感音吸收力

　Active Warning Device 主動(dòng)警告設(shè)施

　Actual flow rate 實(shí)際車流率

　Actual travel time 實(shí)際行駛時(shí)間

　Actuated Signal 觸動(dòng)式控制

　Adaptive Control 調(diào)適性控制

　Adaptive route choice 適應(yīng)性路線選擇

　Adaptive signal 適應(yīng)性號志

　Adaptive signal control 適應(yīng)性號志控制

　Adaptive signal control strategy 適應(yīng)性號志控制策略

　Added turning lane 轉(zhuǎn)向車道

　Adit 橫坑

　Adjustment factor 調(diào)整因子

　Adjustment Flow 調(diào)整流量

　Adult guard 成人導(dǎo)護(hù)

　Advance warning marking 早期警告標(biāo)線

　Advanced driver information system ADIS 先進(jìn)駕駛?cè)诵畔⑾到y(tǒng)

　Advanced payment 預(yù)付款

　Advanced Public Transportation Services APTS 先進(jìn)大眾運(yùn)輸服務(wù);先進(jìn)公共

　運(yùn)輸系統(tǒng)

　Advanced public transportation system 先進(jìn)公共運(yùn)輸系統(tǒng);高等旅客信息系

　統(tǒng)

　Advanced Traffic Management Services ATMS 先進(jìn)交通管理服務(wù)

　Advanced Traveler Information Services ATIS 先進(jìn)旅行者信息服務(wù)

　Advanced Vehicle Control and Safety Services AVCSS 先進(jìn)車輛控制及安全服

　務(wù)

　Advanced vehicle control system 先進(jìn)車輛控制系統(tǒng)

　Advance-green design 早開綠燈設(shè)計(jì)

　Advancing effect 前進(jìn)效應(yīng)

　Advancing shoring method 支撐先進(jìn)工法

　Adverse slope 逆坡

　Aeolian Soil 風(fēng)積土

　Aerial camera 航空攝影機(jī)

　Aerial leveling 航空水平測量

　Aerial Map 航測圖

　Aerial perspective 鳥噉圖;空中透視

　Aerial photogrammetric target 航空標(biāo)