In the U.K. we use the term 'dead-end street' for a street that goes nowhere. In other words, a road that only has one way in or out. The term can also mean: "a situation from which there seems no way to escape" ~ and that pretty well sums up the Nanyuki 'slums', or any other 'slums' come to that.
I only took two photos in our tours of the slum areas ~ this one and another on the same spot with two of our team in the picture. It was heart-breaking to walk around them and see the kind of 'homes' some people have to live in. In another area we talked to a man who, for more than 20 years, had eked out a 'living' mending buckets and bowls, earning just about enough cash, (around £1 a day), to keep himself fed. Believe me, it's another world to the one that most of us are privileged to know.