Gunderson introduced their MAXI-I articulated cars in 1988, with the first run lasting until 1990. During that time, 270 cars were built for railroads such as the Southern Pacific , Trailer Train, Maersk and Rail-Bridge. The cars could carry two 20’ containers or a single 40’ container in their well. A larger 48’ or even 52’ continuer could be positioned on the lower container. With the high demand for interrelation carriers to move 40’ containers, the railroads revised the design. In 2000, the BNSF placed new orders for these cars. Production of these cars continues to this day. The cars feature metal chassis with etched metal details and add-on parts. The cars also feature AZL’s Auto-Latch couplers and roller bearing trucks. Containers are sold separately. The packaging includes slots for ten 40’ containers.