The security in VANETs is improvised with the involvement of Public Key Infrastructure (PKI) and Certificate Revocation List (CRL) through message authentication and the data transmissions are improved through NLOS. The direct communications between vehicles are blocked with interference of obstacles like trucks, buildings. These problems are overcome through NLOS conditions such as location verification and misbehavior detection. The neighborhood vehicles are tracked and are authenticated with EMAP. In EMAP, Certificates and signature matches with the CRL are used in checking and verifying the authenticity of any PKI system.