Convergence of Blockchain and IoT for Secure Transportation Systems in Smart Cities

Table 1

Comparative analysis of the proposed smart transportation system with existing approaches.

Ref. #	Platform	Smart contract	Access policy	Consensus determination	Efficiency	Functionality
[29]	Ethereum	Yes	Consortium	Selected nodes	High	Traffic signal control
[30]	Ethereum	Yes	Permissionless	All nodes	Low	Edge intelligent traffic light control system
[31]	Ethereum	Yes	Consortium	Selected nodes	Low	Secure data sharing in VANETs
[43]	No	No	No	No	Low	AI-enabled ITS system
[33]	Hyperledger Fabric	Yes	Permissionless	Complete nodes	High	Smart parking
[34]	Ethereum	Yes	Permissioned	Complete nodes	Low	Outlier detection using ML
[35]	Ethereum	Yes	Permissionless	Selected nodes	Low	ITS system
[36]	Ethereum	Yes	Permissioned	Selected nodes	High	Reputation system for smart ITS
Proposed system	Hyperledger-fabrics	Yes	Permissioned	Arbitrary nodes	High	Mitigate trust issues,; secure data sharing,; ensure IoT data security