talking about streets, roads, etc.

A while ago, I wrote about a difference in AmE and BrE use of street and road, in that in BrE it's more natural to cross the road and in AmE (certainly in a town or city) it's more common to cross the street. (I've also written about in/on the street, so see that post for more on that.) That's common-noun usage, but what about the proper names of vehicular paths?

There's no question that some ways of designating paths are more common in one country or the other. I've never seen a road named [Something] Trail or [Something] Boulevard in the UK (though see the comments for some counterexamples), and in the US there aren't as many Crescents or (BrE) Closes (pronounced with a /s/, not a /z/). But a problem for making generali{z/s}ations about such things is that the naming of streets or roads varies a lot on the local level in both countries, with different names based on regional differences, urban/rural differences, and terrain differences.

The other day Damien Hall (tweeting as @EvrydayLg) pointed out:

Struck since long B4 I lived there by US habit of omitting eg St, Rd in addresses. We don't.

He hypothesi{z/s}ed that it might be because street is more common in the US and therefore the default. But I don't think that's why. Instead, Americans are happy to say things like

go up Main and take the first right onto Union

...because in most cases that will be an unambiguous statement, since there will typically only be one thoroughfare called Main (Street) and one called Union (maybe Avenue) in a town. I often send packages to a friend who lives in Tennessee. I've never bothered to find out if she lives on Woodland Street or Woodland Lane because I only need to put '140 Woodland' (and the city, state and, if I'm nice, the zip code) on the package and it gets there. As you can see from this (AmE) yard sale sign, the practice of not saying street or road is common. (Where there is more than one with the same name, you'll hear the street/road/lane/whatever more regularly.)

(Side note on codes: Five-digit US zip codes only say which town or which part of a city the address is in, unlike six-or-seven-letter/number UK post codes, which generally indicate the town/part-of-city in the first half (letter-letter+1- or 2-digit number) and which street or part-of-street in the second half (number-letter-letter). Nine-digit US zip codes, called ZIP+4, are a more recent addition* that do indicate street, but which I don't actually use. I couldn't tell you what mine is at the US address I use. 
*It says how old I am that I consider something from 1983 a 'recent addition'. )

'Street'-less street names are so unambiguous that most Americans would immediately recogni{z/s}e that the film title State and Main refers to a corner in a town--mostly likely in the cent{er/re} of the town, since those are common street names in American towns and because we refer to (AmE) intersections or the corners at those intersections in that way. 

(I'm sure I've mentioned before that Main Street is a likely street to have in a town as the main street. It is also metaphorically used to refer to 'the inhabitants of small US towns considered as having a narrow-minded or materialistic worldview' (AHD5). So, politicians might worry about 'what will fly on Main Street'. The High Street is the proverbial main street in a British town (it may or may not be named High Street) and is used metaphorically to refer to the commercial market--i.e. 'what will fly on the high street' is what the masses are likely to want to buy.)

British roads need the street or road (etc.) because little is unambiguous when it comes to British road names.

Take my former (more common in AmE) neighbo(u)rhood as an example:

There is a Buckingham Road, which meets Buckingham Place. Buckingham Street runs parallel to Buckingham Road, but doesn't meet Buckingham Place because halfway through it changes its name to Clifton Street. Off the map are Clifton Road, Clifton Hill, Clifton Street, Clifton Place and Clifton Terrace. But we don't need to leave this map to see that there's also a West Hill Street, West Hill Road and West Hill Place. I also feel bad for the people who live on the parallel Albert Road and Alfred Road who probably get each other's (AmE) mail/(BrE) post all the time.

Once I found an unconscious man on Buckingham Place.  Except I didn't know which Buckingham it was. The ambulance people were (BrE) well (orig. AmE) pissed off at me.

If that weren't bad enough, I now live on a road that shares its entire name with another road in the same city. When I tell taxis where to take me I have to say "X Street, off Y Road". We always tell plumbers and such which one to go to (we even give them our post code) and then when they don't show up, we text them to say "no, it's the other one".

A famous exception to the 'one pathway per name' rule in the US is New York City, which has both a 3rd Street and a 3rd Avenue. Except that it doesn't really have a '3rd Street', since you need to put East or West in front of it in order for the house number to be meaningful--so if someone says they live on East 5th, you know it's East 5th Street. In New York and the US more generally Avenue is often abbreviated in speech (as well as writing) to its first syllable (written as Ave. or Av.). 

And so onto the Easts and Wests. In the US, you can reasonably expect that East Main Street and West Main Street are the same thoroughfare, but that house numbering starts from the where they join (or divide, depending how you think of it). East Main Street will run to the east from that (AmE) intersection/(BrE) junction.

In some cities they put the compass-points after the name and that can mean something different. In Washington, DC, it indicates quadrant of the city that that part of the road is in. So, 7th Street NW and 7th Street SW are one long road that runs north/south, but the parts of it in different quadrants of the city. On the other side of the capitol building, the street numbering starts over, and so 7th Street SE and 7th Street NE run parallel to the other 7th Street NW/SW.

So, the other day, I had to find Brunswick Street East in Hove (UK). Somehow (¡Apple Maps!) I ended up on Brunswick Street West. I knew that Brunswick Street East would not be a continuation of West (after all, the road was running north-south), but I hoped it would be the next street eastward. It was not. At least it was eastward. (I hadn't been willing to trust even that.) But I did get to see Brunswick Place, Brunswick Square and Brunswick Terrace in my explorations.

Finding street names is its own challenge. In the US, street signs tend to be affixed to poles at the corners of roads. At some big intersections, they may hang over the road on the wires that hold the (AmE) stop lights/(BrE/AmE) traffic lights. In the UK, they tend to be on buildings or walls near the end of the road. This may require some searching since some are high and some are low. Here's one of my favo(u)rites from Brighton:

House-numbering, of course, is another nightmare. In the US, it's pretty predictable that even numbers will be on one side of the road and odd ones on the other. In the UK, it might be that way (though you've no guarantee that 92 will be across the street from 93--it might be many houses further down). Another UK way is to have consecutive numbering up one side of the road (1, 2, 3, 4,...) to wherever the road ends and then down the other side, so that, say, 52 and 53 may be across the road from one another, but 1 will be across the road from 104. Another way it might be is that the name of the road on one side is different from the name on the other side--so, for example, the people at 15 Vernon Terrace in Brighton live across from the people at 17 Montpelier Crescent. (And Vernon Terrace only lasts for one (AmE) block, after which its name changes and house numbers re-start twice before you get to the sea, which has pleasantly few thoroughfare names.)

I've talked about differences in house numbering on Numberphile, so (BrE) have a look at the video if you are (orig. AmE) nerdy enough want to hear more about house-numbering: