In the Vehicular Ad-hoc NETworks (VANET),the collection and dissemination of life-threatening traffic event information by vehicles are of utmost importance.However,traditional VANETs face several security issues.We propose a new type of blockchain to resolve critical message dissemination issues in the VANET.We create a local blockchain for real-world event message exchange among vehicles within the boundary of a country,which is a new type of blockchain suitable for the VANET.We present a public blockchaln that stores the node trustworthiness and message trustworthiness in a distributed ledger that is appropriate for secure message dissemination.