单进口轮流放行方式的四路环形交叉口交通信号控制
, 耿现彩, 何龙 Signal timing plan for fully signalized four-leg roundabouts with single-approach-entering operation
XU Hong-feng, GENG Xian-cai, HE Long
, GENG Xian-cai, HE Long Fig.4 Common phase sequence
