if your talkin' about Norfolk Southern's Roadrailers, the semi truck trailers, then look no further than Bowser Mfg. in Pennslyvania. they can be built either for the rail or for the road. You need one couplermate for each train of these you would want to run. just add a little more weight to each trailer and they track nicely.
anybody run these on their layouts? Where can you buy them?