(Not being a jerk) if you just Google "truck telematics" the front page (and ads) are basically the big players. There are many more who you'll never hear about

(Not being a jerk) if you just Google "truck telematics" the front page (and ads) are basically the big players. There are many more who you'll never hear about too. They generally track the Tractor (truck) and Trailer, and also provide regulatory (hours of service) and Dispatch (sending jobs to drivers). They also do a million other things, but that's the gist.