Quote
A single square pole instead of multiple round poles is used behind new signs.
Is that a fairly small square pole? I don't know how many of you are familiar with both, but just compare the typical American and British methods of mounting a simple sign (e.g. a single STOP or YIELD sign). The British arrangement is pure overkill.

Quote
You should try a Rhodesian (long now Zimbabwean) strip road. It's essentially a dirt road with a single one-car width of tarmac down the middle.
We have those in Norfolk, except the dirt portions to the side are known as fields! [Linked Image] Seriously though, there are a lot of back lanes only wide enough for one car.

Quote
people assumed they were secret codes put up to help UFOs find their way around town!
Yikes! They do look a little confusing.

Don't tell anyone, but I reckon they were the Irish branch of THIS CONSPIRACY! [Linked Image]