look at the slip roads on that

It's amazing what you can be reduced to looking up on the internet when you're bored.

Out of the window of the office where I work I have a panoramic view of the Almondsbury Interchange which is where the M4 and M5 cross. It's a complex junction, pretty busy at morning and evening rush hour, but rarely totally gummed up.

So far so relatively mundane, you might think, but you'd be wrong. It turns out there is a whole branch of civil engineering, planning etc. and needless to say several websites dedicated to motorway junctions, and apparently this one is a particularly sophisticated example of the genre - so much so that there are only two others like it in the country, one at the far eastern end of the M4 where it meets the M25, and one at the junction between the M25 and the M23 on the way down towards Gatwick Airport.

Now that is, if not exactly Absolutely Fascinating, then at least Quite Interesting. Isn't it? No? Please yourselves.....