I like the idea. I used to be a military air traffic controller (for about 3 years) and have seen a few cases of issues between ground traffic, either vehicles, or helicopters or other airplanes and airplanes landing or taking off. We had a somewhat imperfect system of tracking whether runways were free or in use.

Relying solely on speech recognition seems a little tricky though. Either way you'll probably want to involve someone from the ATC side sooner rather than later.