Separate road 是指两条或更多的道路在某个点分开，然后又在另一个点重新连接的道路。这种设计可以提高交通效率、减少交通拥堵和事故风险。
英文解释：A separate road is a type of road where two or more roads split at a certain point and then reconnect at another point. This design can improve traffic efficiency, reduce traffic congestion and accident risks.