TOFC loading

[chutton01]

If you really get into operational considerations of TOFC, don't forget the various intermodal "Piggyback Plans" that were around back in the day, as discussed in this thread (wherein Greyhounds expresses his appreciation for ICC regulations ). For a slightly more structured discussion, this Google Books excerpt from "Practical Handbook of Industrial Traffic Management" (1987, but it reads more like it's from 20 years earlier) could be interesting.

The only real effect I could see those plans having on a layout is the ownership (and names) on the tractors, trailers, and TOFC rolling stock.

[NHTX]

Another type of TOFC operation where the trailer rode on a "track" was the Clejan system as employed by the New Haven and Southern Pacific in the late 1950s/early 1960s. The trailers were equipped with very small diameter flanged wheels between the rubber-tired road wheels that used a raised center sill on the car for guidance, and support during transit. This system died an early death for obvious reasons. To use the cars, any trailer had to be equipped with the Clejan wheels and, the entire American trucking industry was not about to retrofit hundreds of thousands (millions?) of trailers, to interface with their most fierce competition!

[Anonymous]

I did not see a direct reference to NYC's flexi-van service, but here are some links to check out:

https://www.flickr.com/photos/jnos363/5082152589

http://rrmodelcraftsman.com/reviews/cm_extra_walthers_flexivan.php

I dont think that Walthers produced the 6th wheel Yellow tractor (called a Commando by NYC).  They did make the Flexivans themselves and possibly the trailer bogies.  Check out this thread for an idea on how to kitbash the commando:

http://cs.trains.com/mrr/f/13/t/246384.aspx