This final paper describes the application of blockchain technology in traffic with an emphasis on maritime transport. The basic features of blockchain technology, advantages and disadvantages and the importance of smart contracts in maritime transport are described. Maritime transport has experienced significant technological changes in the past few years. Blockchain is a type of technology that, given its characteristics, offers the shipping industry significantly faster processing of processes and documentation, protection and security. In shipping, blockchain technology represents a mechanism for verifying the responsibility of partners, suppliers, service providers and competent authorities, and for increasing confidence in the authenticity of collected data in transactions between participants. Projects that offer changes in maritime transport using blockchain technology are: CargoX - a platform for creating a smart waybill, DexFreight - a decentralized platform for networking all participants in maritime transport and others. Blockshipping, a decentralized transport containerization platform and GSBN - a network for managing all logistics data in one place.