Yeah I live right next to a railway line and I seen something like this one night. Didn't have a fucking clue what it was. Absolutely mental looking.
how bizarre, i was kept awake last night by a combination of the heat and one of those damn things with its droning white noise all night long. my bedroom window backs on to a railway line. i know they've got to do repairs but at 5am i felt like throwing things at it. in the end had to put in some noise cancelling headphones which did the trick.