Re: I remember that accident - only in 1967!
"The BEST are MANAC - dry van trailers in the U.S. under the name TRAILMOBILE. Their advantage is the supports of the Mansfield Bars are towards the outer end - where the worst damage occurs,"
But I doubt TRAILMOBILE rigs are recommended for areas with way-above-grade railroad crossings, since lowering the crash zone inevitably lowers the ride height, raising the chance of a hump taking the trailer off its wheels.