The hills do make a massive difference to many people in Sheffield-the elderly, the ill who can't walk up hills but could walk a distance on flat roads, people pushing babies in buggies. These are all people for whom bikes would not necessarily be an answer, and the hills are significant. If there were trams in the south of the city they would provide an answer, but I have no idea where you could put them! Ecclesall Road or Psalter Lane are certainly not wide enough for them. Trams are brilliant to get to Meadowhall once you get to the city centre, but some better transport in the south would be great. Also, as someone said, getting across the city. via public transport is impossible. Bents Green to Crookes/Fulwood for example. Again, the hills make it difficult to walk too, not just because of the hills but the lack of decent pavements.