Decentralized autonomous transportation systems are leveraging blockchain to enhance efficiency and security. Projects like IOTA and DOVU are developing platforms where autonomous vehicles can communicate, share data, and transact with one another without central intermediaries. This peer-to-peer network allows for optimized routing, secure transactions, and real-time updates, transforming urban mobility. By reducing traffic congestion and improving coordination between vehicles, these systems aim to create smarter, more sustainable cities.