Frisco had their own trucking company too-FTC, don't know if any railroads have them today or not
Well, here's one.
That's a nice Volvo tractor all done up in CN colors. The tri-axle container chassis indicates the photo was taken in Canada. CNTL does have significant operations in the US as well.
Several US railroads did own trucklines. Those that quickly come to mind are Santa Fe Trail, Rock Island Motor Freight, your Frisco Transportation Co., and a rather large PMT. PMT was either Pacific Motor Transport or Pacific Motor Trucking, I don't remember. It was an SP operation. Cotton Belt also had its own trucking operations.
When motor freight was first Federally regulated in 1935 the existing trucking operations were literally frozen in place. So if a railroad had a motor carrier up and running it got to keep what it had. It couldn't expand, but it could stay in place. (Economic regulation of transport was, from start to finish, a fool's errand.) The restrictions placed on rail-truck integration greatly harmed our economy and our people. Freezing economic development in place, as was done, and then subjecting it to a lot of dang fool rules is going to hurt. And it did hurt. Badly.
Today, there is no necessity for a railroad to have a seperate trucking entity. They can just hire a trucker, owner operator or otherwise, to do the work. No government by your leave is required.
CN has chosen to operate through CNTL. BNSF and NS have chosen to partner with truckers such as JB Hunt to do the same thing in a different way. It's basically six of one and a half dozen of the other. It's the same thing done differently with basically the same result.
CN, operating mainly in Canada at the time, was mostly never subject to the inane US rules prohibiting rail-truck integration. They've got a long, successful history doing trucking and they've extended their success with their expansions in to the US.
"By many measures, the U.S. freight rail system is the safest, most efficient and cost effective in the world." - Federal Railroad Administration, October, 2009.
I'm just your average, everyday, uncivilized howling "anti-government" critic of mass government expenditures for "High Speed Rail" in the US. And I'm gosh darn proud of that.