The critical intersection of the main road and the main road or main road and secondary roads intersect the intersection, is the focus of traffic and to divert traffic at key locations, traffic engineering and traffic management focus

Key cross-cutting port refers to trunk road and main road or main road at the intersection of the main roads traffic junction, is focused on the key and channel flow, but also traffic engineering and traffic management focused on the

The essential road intersection refers to the host yang or male principle and the host yang or male principle or the host yang or male principle and the inferior yang or male principle intersection street intersection, is the current capacity centralism and the unblocking current capacity essential

Key trunk road and the main road at intersection or junction of main roads and secondary roads intersect, is the flow to centralize and ease the flow of key locations, and the focus of traffic engineering and traffic management

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