Probably!
Round here contractors seem to sprinkle kit around like confetti. I reckon when something's been abandoned for a month they aren't coming back for it, but other people are a lot faster. We got some of those orange safety barriers which had been left for over three months. Even when you drive past every day it takes a while to get round to hooking up a trailer.
Now I think about it there's a diversion sign just round the corner that was put up before Xmas. But what do I need it for? Traffic cones I do need though.