Hey Bloke! Heres a tip or two. Set up your delivery and dispatch areas in the centre of the length of road. That way you can create buffer zones each end. Probably most important though is to setup your areas in order of reception, delivery, and then exports and garbage. The unloded delivery trucks will then pick up any garbourage/exports on the same trip. :)

There is no need to have paths more than two squares wide. Why are there sooo many exits to the road. Why not create a choke point whereas everyone in or out has to pass through? Why 241 orr so deaths? My Goodness.

Here is an idea. Learn about the Logic curcuits in the game. For example you could have remote doors that only will open when an armed guard is present. You could do this by assigning a guard to patrol one square only, and that square would consist of a floor sensor and so on. Good effort though.