The last few years VANETs have received several ideas related to safety as well as non safety applications for security enhancement and communication methods. In this paper a new technique is proposed for highway vehicle communication, taking the simple highway model for efficient communication among the vehicles. A cluster based vehicle model has been proposed for vehicle communication; the proposed model has applicability in the highway road. This paper focuses on the development of clustering technique, based on the vehicle density, speed and position of the vehicles. The proposed cluster technique is based on the vehicle density on the highway road; RSU is placed on the highway every 3km to 5 km. The cluster head is elected by comparison of each vehicle speed and position of the vehicles. The cluster head is to transfer the traffic related information's like warning messages and alert messages that are frequently sent to the other vehicles. The cluster head switching technique is proposed technique that is if the new vehicle speed is greater than the cluster head than the new vehicle is elected as the cluster head. The new cluster head is transferred messages, warning alerts to the RSU for efficient communication and to avoid the delay overhead.

1. B. Rama Krishnan, R. S. Suresh, R. S. Shaji, 2011. A Cluster Based Vehicular Ad hoc Network Model for Simple Highway Communication, Int. J. Advanced Networking and Applications, p. 755.
2. Peng Fan, James Haran, John Dillenburg, Peter C. 2006. Traffic Model for Clustering Algorithms in Vehicular Ad- Hoc Network, Consumer Communication and Networking Conference IEEE, p. 168.
3. Sushmita Ruj, Marcos Antonio Cavenaghi, Zhen Huang, Amiya Nayak, Ivan Stojmenovic, 2011. Data Centric Misbehavior Detection in VANETs, arxiv. org.
4. Zhigang Wang, Lichuan liu, MengChu Zhou, Nirwan Ansari, 2008, A Position Based Clustering Technique for Ad hoc Inter Vehicle Communication, IEEE Transactions on Systems, Man and Cybernetics Vol 38 No 2.
5. Jiun-Long Huang, Lo-Yao, and Hung-Yu Chien, 2011, ABAKA: An Anonymous Batch Authenticated and Key Agreement Scheme for Value-Added Services in Vehicular Ad Hoc Networks, IEEE Transactions on Vehicular Technology, Vol 60, N0. 1, PP 248-262.
6. Gongjun Yan, Stephan Olariu, Michele C. Weigle, 2008, Providing Vanet Security through Active Position Detection, ELSEIVIER, Computer Communication.
7. Wikipedia Vehicular Ad-Hoc Network, 2013, http://en. wikipedia. org/wiki/Vehicular_ad-hoc_network this page was last modified on January 5 2013.
8. Wikipedia Vehicular Ad-Hoc Network, 2013, http://en. wikipedia. org/wiki/Traffic_flow network this page was last modified on January 5 2013.
9. Mushtang Y. Gadkari, Nitin B. Sambre, 2012, VANET: Routing Protocols, Security Issues and Simulation Tools, IOSR Journal of Computer Engineering Volume 3, PP 28.
10. Wikipedia Vehicular_communication_systems, 2013, http://en. wikipedia. org/wiki/Vehicular_communication_systems this page was last modified on March 2013.

Cluster Delay Overhead Obu Rsu Vanet.