Actually, hmmm. In the parse script: 

    # create a route as a combination of 'shape' and 'turn' information

    # make sure we discard duplicate records.

    waypoints = []

    for i in range(-1, len(coords)):

        if route.has_key(i):

            if len(waypoints) and waypoints[-1].coord == coords:

                del waypoints[-1]

            waypoints.append(route)

        else:

            if waypoints[-1].coord != coords:

                waypoints.append(Wpoint(coords))


I don't know Python. However, does "waypoints[-1]" mean the waypoint element before the current one?