Bimodal container chassis

A bimodal container chassis for supporting a container during roadway and railway transit, the chassis comprising:

• a mainframe having first and second ends, a top edge and a bottom tapered edge, the bottom tapered edge positioned at an acute angle from horizontal such that a first end of the tapered edge, which is oriented towards the first end of the mainframe, is higher than a second end of the tapered edge, which is adjacent the second end of the mainframe;
• and
• a running gear attachment connected to the mainframe and slidable along the bottom tapered edge in first and second directions between an over-the-road position and an over-the-rail position;
• wherein the first direction is upward and toward the first end of the mainframe, and the second direction is downward and toward the second end of the mainframe such that the running gear attachment is disposed adjacent the second end when in the over-the-road position and disposed upward relative to the over-the-road position and toward the first end when in the over-the-rail position.