Vehicular Ad hoc network is a self-organizing net-work between the vehicles that helps in enhancing transportation safety and efficiency. Vehicular Ad hoc network has a wide range of applications that needs a high level of security, as a single vehicle sending out false warnings can disrupt the traffic of whole highway. Eviction of such misbehaving vehicle is a critical issue of vehicular ad hoc network. Almost every approach, proposed for security of vehicular ad hoc network communication is based on public key infrastructure in which only certification authority can revoke the certificate of misbehaving vehicle. In this paper, we propose a node eviction protocol based on RSA Threshold signature which can evict the misbehaving node from vehicular ad hoc network by maintaining the properties of public key infrastructure architecture.