Now that I'm a Certified Emergency Vehicle Operator Instructor (CEVO-I), I can tell you hands down, that racing in LFS helped me be a better driver, and helped me be a better racer and helped me be much calmer behind the wheel when I first got into an ambulance.
It's not going to happen for a very long time. Scawen has said it's going to happen after S3 is shipped, so that's awesome and I would LOVE to add my home town to LFS so that people can learn how to drive my Fire Districts on a Sim (Saves Gas, Saves Money, Saves Time) and we can even do drills with getting to the scene of an alarm as fast, but also as safe as you can.
I would LOVE to do this right now as I'm now the Chief of the Department and I can make this happen overnight if I could only get some more information about the game track format. I looked over the files in the past, and it should be possible to get 6.5 square kilometers into a file without overflowing the 32bit type limit. That would fit the north side of my Fire District no problem. Scawen if any of this interests you, please let me know. I would love to collaborate on this project. It could even be sold to other departments and make some money.