Consecutive routes
Aug. 21st, 2021 06:53 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
dmazePittsfield has US-7, MA-8, and MA-9 (and there are signs from US-20 that list all three). Routes 7 and 8 don't connect. But, if you're on MA-8, then you can go east to MA-9, and when you get to Northampton, you can turn on to MA-10. If you go north a very long way, staying on Route 10, then NH-10 intersects NH-11 in Newport, NH; go west and you'll reach NH-12 before you cross the Connecticut River; go back south into Massachusetts and MA-12 will reach MA-13 in Leominster.
So: what is the longest chain of consecutively-numbered routes you can connect? You can cross a state line, but only if the road keeps the same number (NY-7 turning into VT-9 breaks the chain). No specific need to start with Route 1. No subsidiary routes (MA-2A, "business" routes, &c.; 3-digit routes like I-290 or US-202 are legitimate but have to stay in sequence). Distance doesn't matter (starting in Key West, taking US-1 to US-2 in Maine, then to US-3 and US-4 in New Hampshire and then US-5 in Vermont is a legitimate start) (but if you start off this way, US-7 runs parallel to CT/MA/VT-8 and does not intersect anywhere).
So: what is the longest chain of consecutively-numbered routes you can connect? You can cross a state line, but only if the road keeps the same number (NY-7 turning into VT-9 breaks the chain). No specific need to start with Route 1. No subsidiary routes (MA-2A, "business" routes, &c.; 3-digit routes like I-290 or US-202 are legitimate but have to stay in sequence). Distance doesn't matter (starting in Key West, taking US-1 to US-2 in Maine, then to US-3 and US-4 in New Hampshire and then US-5 in Vermont is a legitimate start) (but if you start off this way, US-7 runs parallel to CT/MA/VT-8 and does not intersect anywhere).
