What’s the problem?

How do they damage each other?
sugar maple roots cut
                                                      Buttress roots of sugar maple cut for sidewalk replacement

How can I avoid cutting the roots? If I decide I have to cut the roots, how can I least harm the tree? How can future damage to sidewalks be avoided? Where can I get more information?

Fazio, James R., Ed.  1991.  "Resolving Tree-Sidewalk Conflicts."  Tree City USA Bulletin 3.  Nebraska City, NE: National Arbor Day Foundation.  Anonymous.  1995.  "Trees and Sidewalks."  Iowa State University.  For other information, advice and help on this topic, call offices of your State Urban Forestry Coordinator or University Extension service, visit urban forestry web sites.