Here’s a long document from the “Trees and Design Action Group” in the UK about everything to do with planting trees in the city. Of particular use to me are some good references on dealing with underground utilities, species selection, and just lots and lots of great pictures. Even some nice stats on the odds of being killed by a tree compared to car accidents and cancer (the odds are very low, but not zero).  Trees really can be done a lot better than most American cities do them.