In order to be ADA compliant, a sidewalk should be 32" wide MINIMUM from edge to obstruction.
On Natchez Trace, between Woodlawn and Blair, in Nashville there are many sidewalk obstructions but most are in surprising compliance with the ADA rule of 32 inches.
Some are not.
Unlike the guy wires above, some impediments are simple to remedy.
Despite being ADA compliant, these bushes are a hindrance to walking.
If you have bushes or low hanging trees - trim them back so the sidewalk is as wide as possible.
Optimally, Nashville.gov has proposed a sidewalk plan (http://mpw.nashville.gov/IMS/Sidewalks/StrategicPlan.aspx) that prescribes a 5' sidewalk combined with a 4' green or buffer zone similar to the image below.