A—3-1eg Interchange
B—peak period
C—absolute speed limit D—acceptable gap
E—access
F—accident
G—accident cause
H—advanced public transportation services
I—air resistance
J—annual average daily traffic
K—area traffic control
L—automatic vehicle monitoring system
M—banning of turning movement
N—belt Highway
O—bike lane ( )三路立体交叉 ( )先进公共运输系统