https://interestingengineering.com/man-uses-99-phones-and-a-handcart-to-create-a-virtual-traffic-jam-on-google-maps
This reminds me of the traffic wave modifications.
https://interestingengineering.com/man-uses-99-phones-and-a-handcart-to-create-a-virtual-traffic-jam-on-google-maps
This reminds me of the traffic wave modifications.