| 摘要 |
TITLE: CROSSROAD WITHOUT TRAFFIC LIGHTS A crossroad includes two roads intersected with each other. One of the roads is level and straight, and the other road is provided with a pair of second dimensional passages, such as tunnels, subways or elevated roadways, each with a respective bypass merging into one side thereof. The entrance of each passage is provided adjacent to and a short distance from the level road. The exit of each passage is provided adjacent to the opposite side of the level road. |
