Road Cones / Fences / Road Blocks

I was thinking about a city where I've been in before. We as police had the option to place fences, cones and some more stuff.

That way we could make realistic road blocks, fence off any crime scenes etc etc. There were loads of options to do.

I think that it'd bring a good benefit to the police work because we then get the ability to block of lanes when there's been an accident and make scene's look more interesting.

It's just an idea, I was wondering if anyone else would be interested and if so if something like it could be implemented. If not then I don't mind. Just a thought :)