This is DAPP (distributted application) working entirely on blockchain network.
You must be connected to Ropsten network if you want to see tha simulation data. You can use Chrome + MetaMask for that.
Participants are: Drivers, Cars, Toll Booths, Toll Booths Operators and Regulator.
This is not about visual look - this is about technology! This simulation is done based on:
This simulator logs are turned ON, so if you are interested, you can look at console.