Just read that London tube map is going to be very complicated in 2016. There is not enough space to put in information such as wheel chair station, partial closed station, night map.
It seems to me that an app is a perfect solution to dynamic map that changes to users requirement :)
- day or night stations.
- zoom to view lift for wheel chair
A map that draw on google am has the advantage of better journey planning. It shows the real distance.
Maybe the cost of travel in path finding should uses distance insteads.