Vehicular Ad Hoc Networks (VANETs) face significant challenges due to frequent
communication link disruptions caused by high vehicular mobility. Addressing these issues,
this paper introduces a Dynamic and Reliable Routing Algorithm (DRRA) designed to enhance
clustering stability and improve security. DRRA employs a novel Cluster Head (CH) election
strategy based on relative mobility metrics to ensure reduced re-clustering and seamless
communication. The algorithm integrates robust mechanisms to mitigate Sybil and Denial-ofService (DoS) attacks, ensuring secure and efficient data dissemination. Simulation
experiments conducted using NS-3.25 and SUMO validate the performance of DRRA,
demonstrating significant improvements in metrics such as CH lifetime, network throughput,
and packet delivery ratio compared to existing schemes. These results highlight DRRA’s
potential to enhance the reliability and security of VANETs, particularly in high-mobility and
dense traffic scenarios, while addressing key limitations of current methodologies.