Aiming at problem of transmission bottlenecks of the Gateway node in the clustered vehicular Ad Hoc networks where there is a large amount of datas. Combine with DMAC clustering algorithm

propose a new method that set up virtual communication path between two hops away cluster-head by using directional antenna. The simulation results show that compared with the omni-directional communication mode

the method can effectively reduce 110 ms of the end-to-end delay between two clusters

and increase the network throughput nearly 3 Mbps.