Trucks work. You just don't see anything when you use them. They make they're pickups and deliverys on time and you can see the resources change appropriately, but there is no graphic of the truck displayed on screen. You also deploy them using the trucking menus when you right click as opposed to the tile picker like you do for the dozers and diggers.
I've heard mixed results of the monorail but I mostly hear it doesn't work. I suspect most of the problems people have are with the configuration needed to run the monorail. However, I can't really back that up since I built one once a long time ago but I honestly can't recall if it worked or not. I do know it can be built, I don't remember how well it works.
What is the "flyers" think you're talking about? Is that a regional word for monorail?