Blockchain technology for the Internet of Vehicles (IoV) research investigates how decentralized ledger systems can secure, manage, and optimize communications and services in highly dynamic vehicular networks. Research papers in this area explore applications such as secure vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication, tamper-proof traffic data sharing, decentralized identity management, autonomous vehicle coordination, and fraud-resistant services like tolling or ride-sharing. Smart contracts are leveraged to automate tasks such as automated billing, insurance claims, and predictive maintenance, ensuring transparency and accountability among stakeholders. Studies also address critical challenges including scalability to handle large numbers of vehicles, latency for real-time operations, privacy preservation, and interoperability across heterogeneous vehicular networks. Proposed solutions include lightweight consensus algorithms, off-chain storage, sharding, and integration with edge/fog computing to enhance efficiency. Overall, this body of research demonstrates blockchain’s potential to provide secure, reliable, and decentralized frameworks that strengthen IoV ecosystems and support the development of intelligent transportation systems.