Something like a* pathfinding might be useful, commonly used in games to plot courses between points on a grid - there may be something similar for street maps.

Something like a* pathfinding might be useful, commonly used in games to plot courses between points on a grid - there may be something similar for street maps. http://qiao.github.io/PathFinding.js/visual/ http://qiao.github.io/PathFinding.js/visual/