This reminds me of the novel Bleeding London by Geoff Nicholson from 1997. One of the characters is trying to walk every street of the London A-Z map. (<a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;Bleeding-London-Geoff-Nicholson&#x2F;dp&#x2F;0575400560" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;Bleeding-London-Geoff-Nicholson&#x2F;dp&#x2F;057...</a>)