I have worked on this - I used to simulate motorized traffic to use as a deterrent to cycling routes but the latest iteration just proxies this using road class

I have worked on this - I used to simulate motorized traffic to use as a deterrent to cycling routes but the latest iteration just proxies this using road class http://www.nature.com/articles/s41598-019-55669-8 http://www.nature.com/articles/s41598-019-55669-8 Google street view would be such a rich mine for data on route pleasantness, unfortunately google don't like people mining it. A current gap in the market, by the way, would be routing for e-bikes. In the UK the power assistance is legally limited to 25km/h which means it actually makes sense to take hillier routes so you can climb using power assistance then descend fast under gravity alone. Not seen a router which can do that yet!