And UPS/FedEx seem t track their trucks. Having found "trackyourtruck.com," tracking seems possible on a large scale
Oh please !!
If you're going to quote an example at least quote a decent one in a similar environment (i.e air, sea ... or somewhere in deepest darkest Antarctica or whatever).
Quoting a ground based solution to an aviation problem is totally irrelevant and pointless.
Fedex, UPS, taxi operators .... they track their vehicles using M2M. And typically these days this operates over mobile/cellular networks. Maybe with failover to satellite, but not normally, because .... yep, you guessed it ... satellite ...is... EXPENSIVE ! So you'll probably only find that on those armored cash-carrying trucks etc.