An SMS system is certainly one that should be encouraged. For some years now the major carriers have had their own safety organizations within the carriers, and they're doing a great job. I don't think you have too many worries with the major carriers; the worries, I think, are in the secondary or tertiary carriers and, as I mentioned, taxi operations, ambulance service operations, and other sorts of operations that are running on marginal economics.
On February 28th, 2007. See this statement in context.