Looks uncannily like high-density housing, or a freeway at rush hour.
There's such equivocality in these images. For a lot of people, in the short term, they are bad news. For the planet, in the long term, they are good news. You can see the "growth vs sustainability" debate in them. Sorry I am feeling poetic.
Avonmouth looks usually quiet there http://www.guardian.co.uk/business/gallery/2009/jan/16/unsold-cars?picture=342161398 This is what it looked like in October, although I wasn't trying to capture the cars at the time: http://www.flickr.com/photos/gusset/2965674967/