Here are a few URLs that return results with walking or driving but not with transit (i.e., change mode to walking or driving and you will see results)
http://maps.googleapis.com/maps/api/directions/json?origin=EC3N4AB&destination=EC4M8AD&sensor=false&mode=transit
http://maps.googleapis.com/maps/api/directions/json?origin=Toledo&destination=Madrid®ion=es&sensor=false&mode=transit
I cant get a single response with mode=transit. Notice that the second URL is straight from API documentation
Anyone else noticing the same thing?
Transit directions don't work globally. For example, this request works:
http://maps.googleapis.com/maps/api/directions/json?origin=san+francisco&destination=seattle&sensor=false
On the other hand if you go to maps.google.com and attempt to get transit directions via the UI from Toledo to Madrid, it notes the request is outside the coverage area. The way the API returns this information is via the INVALID_REQUEST status.