✅ CN Gunderson Multi Max Auto Rack SXT32749 Canadian National

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Technical Specifics

The bi-level enclosed autorack emerged from decades of evolutionary development in rail-based vehicle transportation. Early autoracks of the 1960s were open or semi-open structures mounted on flatcars, offering little protection to the automobiles and light trucks they carried. Theft, vandalism, and weather damage were persistent problems, prompting the industry to move toward fully enclosed designs. By 1973, the first fully enclosed autorack configurations entered service, incorporating solid side panels, end doors, and roof sections that dramatically reduced vehicle damage claims and losses in transit. The bi-level variant of this enclosed design was developed specifically to accommodate taller vehicles such as vans, pickup trucks, and sport utility vehicles, which could not fit within the vertical clearances of the more common tri-level enclosed configuration used for standard passenger automobiles. As the North American automotive market shifted through the 1980s and 1990s toward light trucks, SUVs, and minivans, demand for bi-level capacity grew substantially. Railroads and car leasing pools expanded their bi-level fleets to meet the needs of automakers shipping these taller vehicles from assembly plants to distribution points across the continent. The Trailer Train pool, later reorganized as TTX Company, played a central role in managing and standardizing the flatcar platforms on which many of these racks were mounted. Builders including Gunderson, Trinity Industries, and Greenbrier became the principal manufacturers of bi-level enclosed autorack equipment in the late twentieth and early twenty-first centuries, producing large numbers of cars for the TTX fleet and for individual railroad operators. The bi-level enclosed autorack became an indispensable part of the North American automotive supply chain, with tens of thousands of units in service across the continent. Its development reflected the broader trend toward protecting high-value vehicle cargo while maximizing the number of units that could be moved efficiently per train. The type remains in active service today, handling the bulk of rail movements of trucks, SUVs, and vans from manufacturers such as Ford, General Motors, and Chrysler to dealerships throughout the United States, Canada, and Mexico.

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Brands that produce Bi-level enclosed autorack in HO scale

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