Vehicle Ad-hoc Networks (VANETs) is an emerging research area that has received much attention over the recent years. One of the main challenges of VANET is the routing protocol and the development of reliable ad-hoc communications between vehicles. We proposed a cooperative scheme between V2I and V2V communications in the highway scenarios to extend V2I connection in the uncovered areas. The main focus of this primarily work is to evaluate the communication and structure stability of the ad hoc vehicle-to-vehicle (V2V) Chain branch leaf clustering scheme (CBL) in an infrastructure network. The insertion of infrastructure components is materialized by the roadside units (RSU). The results show the adaptation of the vehicle ad hoc network clustering in the presence of roadside units (RSUs).