I'm not sure what they used for the web visualizations but I have seen this before with the python osmnx tool (https://geoffboeing.com/2019/09/urban-street-netw

I'm not sure what they used for the web visualizations but I have seen this before with the python osmnx tool (https://geoffboeing.com/2019/09/urban-street-network-orientation/ https://geoffboeing.com/2019/09/urban-street-network-orienta...)