Sorry, wrong number
roads.org.uk
roads.org.uk
The M1 is a separate road
I guess my teacher was right and my youthful smugness was unfounded and misplaced. :D
EDIT: I just googled a bit more and discovered that at least one map (the one inch map from 1963) labelled the old road as A1 and the new road as A1(M) as distinct roads on the same map. I doubt I'd have actually seen that though, as it was from well over a decade before I was born, although my dad had lived in Stevenage around that period so maybe he still referred to it by its old name and I'd just picked up on that. Or more likely, I was just wrong!
Avenue and Street differentiate those pretty well, and they also add NE/NW/etc. but use it as a prefix for avenues and a suffix for streets, so "NE 123rd Avenue" vs. "123rd Street NE".
Short sections are usually called "Place" with the number of the nearest avenue or street, but they copy the suffix/prefix along with the number.
As a result you can find for example, "NE 36th Place" and "36th Place NE" about a quarter mile from each other. Since the house number is based on the cross street, you can in theory end up with doppelganger addresses where the only difference is the position of "NE".
For example, we live south of Santa Fe, but to tell people how to get here [0] we have to say "take I25 North" (because heading out of Santa Fe and away from Albuquerque, the road heads south east, even though its ultimate destination (Buffalo, WY) is clearly to the north. The road signage is consistent, but if you also have a reasonably strong sense of direction, your head can be asking "why am I going south on a north-labelled road" or a variant thereof.
In Texas, I35 runs north and south. But it also splits at one point, creating I35 east, and I35 west, so if you’re going from Austin to Dallas you take I35 east northbound.
So we have the M74 and A74(M) which are different pieces of the same road. There are bits of the A90 interspersed with bits of the M90, although the bulk of the A road is north of all the motorway and the motorway has in many places a different alignment to the original road. And the M8 is the main road connecting Glasgow and Edinburgh, replacing the A8, which is a different road with only segments remaining.
He visited and documented anything 'interesting' about (and sometimes just nearby) every motorway in the UK, in a pleasingly entertaining style. He's also got series about all the service stations, some abandoned roads, and is currently working on road journeys recommended in a 1920s Michelin guide.
https://en.wikipedia.org/wiki/United_States_Numbered_Highway...
We just don't have rules that are as deliciously arcane as the UK's for numbering our roads.
99 doesn't fit into the numbering scheme at all. The road shouldn't even be a two-digit number; it's not a major trunk route and it's entirely within a single state. It only serves to connect interstates 76 and 80, so it should have been a spur route of one of those.
Even the cases of B roads inheriting the number of the A roads they replaced makes as much (if not more) sense as a motorway inheriting that number. Knowing that a road used to be the main road before the bypass was built is useful information!
Around East Lothian, where I'm based, old alignments of the A1 are still A roads: the A199 and A198.
https://www.youtube.com/watch?v=8hlnDvtXW9c
[0] which was also the road that provoked the writing of "Road To Hell" by Chris Rea