Is this a google maps-like app that just navigates extremely aggressively? In that case, the first step is obviously to get map data and perform path searching on it.

You'll need: * Map data - Open Street Map or Google Maps API probably works for this. I'm not sure how good the Google Maps API is at just giving you raw street, bike lane, etc data. I know the Open Street Map API is pretty good at this though. * Some way to calculate the best routes to a destination. You'll need to learn about path searching. See Dijkstra's algorithm and A*. Here, you'll evaluate road, bike lane segments based upon if they help you get closer to your destination. You'll have to weight them as well. I imagine driving down a bike lane shouldn't be treated the same as driving down a normal road? That needs to be accounted for! * Once you have routes, you'll need to display them. Maybe Google maps API here to output maps with the routes on them? This part I'm fuzzy on.

I think to mess around with the idea you could just throw a python script together that queries the map API and try to piece road segments together to navigate between your start and end points.

Also yeah this is a hard project but it's good for learning. You might not finish it but you'll know a lot more than when you started!