From obvious speculation pedestrians only use pavements to walk, therefore crossing two roads which aren't connected becomes a problem. Another suggestion would be to add crossings which are automatically placed when tram stops are created in avenues? 
Also, it would be nice if the pedestrian paths didn't create intersections with the road, but would attach to the pavement.
Also, it would be nice if the pedestrian paths didn't create intersections with the road, but would attach to the pavement.