A small, but fairly dramatic section of my old route mapping.
This is a simpler example from the more complete, and more tedious, map post. (For folks unfamiliar with NH, this is in the south-central region of the state, the very beginning of the Lakes Region, and that is our largest lake - by far - across the upper part of the map.) I used that nice Mapquest feature of creating side trips on your printed map to show how the route has changed. From Alton Circle to South Wolfeboro, you can see that when new Route 28 came in in the 1950's it followed old Route 28 for only a brief portion. Most of it is new road. The mileage only decreased a little, from 10.5 miles to 9, but the estimated driving time is dramatically shortened: 29 minutes versus 12. This explains why people preferred the new type of road that avoided town centers and cut straight across country. The old roads are indeed charming - Roberts Cove Road in particular - but you wouldn't want to do it more than once.