It sounds an awful lot like skytrain construction outside.
Of course it's too late to be working on the skytrain, which brings us to our main point: If you are going to steal skytrain parts either: a.) do it quietly or b.) wait till you're certain everyone is sleeping.

10 minutes later there's a crowd of people outside and several police officers talking about the white pickup truck that loaded up with some building supplies and took off. Bastards kept me out of bed.