IoV is becoming a major facilitator of intelligent transport systems, which can encompass vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and vehicle-to-everything (V2X) communications. Nonetheless, IoV networks can be susceptible to fake information transmission, Sybil attacks, and malicious nodes that decrease the reliability of vehicle exchange of data. The current centralized trust authorities have a single point of failure, bottlenecks in scalability, and poor transparency. In response to those challenges, the paper suggests blockchain-based decentralized trust and reputation management system of the IoV. The system proposed combines a lightweight blockchain consensus among Road Side Units (RSUs) and edge servers with a smart contract-based trust model to assign reputation scores to vehicles dynamically, depending on the accuracy, consistency, and behavior of the data. The blockchain holds trust scores that are imperishable and enable reputation management that is both transparent and incorruptible. The framework is feasible as evidenced by a simulated environment of synthetic vehicular transactions Simulation results indicate faster trust convergence, effective malicious vehicle discrimination, and scalability trends under increasing vehicular density. The findings are based on comparative and theoretical examination, which provides a base to further implementation based on SUMO and Hyperledger Fabric. This study offers a safe and scalable solution to trust management in IoV and opens the gate to safer and more trusted intelligent transport systems.