Smart　city　blueprint　is　constructed　by　increasing　deployment　of　various　Internet　of　Things　devices.　In　this　paper,　we　focus　on　data　transmission　and　request　for　lane　property　right　under　the　domain　of　an　intelligent　traffic　system.　IoT　devices　are　usually　deployed　in　a　heterogeneous　environment,　with　the　natural　gene　of　decentralization.　Compared　with　cloud-based　centralized　architecture,　in　this　paper,　we　introduce　blockchain　as　a　decentralized　technology　to　let　vehicles　jointly　collaborate　without　having　to　go　through　a　central　computing　node　authority.　Data　transmission　between　vehicles　uses　a　peer-to-peer　network　in　which　every　node　communicates　directly　with　every　other　node,　verified　by　their　relevant　end-point　nodes;　lane＇s　acquisition　right　is　approved　by　all　relevant　vehicle　nodes,　as　well　as　with　consensus　agreed　upon　via　smart　contract.　©　2019　IEEE.