life radius
n. The distance from home or work within which a person performs most of their day-to-day activities; the distance within which a person lives all or most of their life.
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Now snow just means putting away my cute shoes, getting up extra early, and a decreased life radius; I basically never leave my county.
—Jamie Lynn Neal, “Snow,” A Single Girl's Journey to a Life of No Regrets, November 27, 2013
Casual bigotry is dying off. Literally. Old people and their parents with a life radius of 30 miles.
—Will Durst, “Equal Is as Equal Does,” The Huffington Post, March 29, 2013
2010 (earliest)
While trying not to be on a high horse, I drove my car 4,000 miles in the last year, because I moved close to work.

Recognize that YOU having a life-radius greater than a couple miles is what caused this.
—mdh, “Oil spill: Here's what you can do to help,” Boing Boing, June 18, 2010