Uncommon Very Tall Design
There are several very tall bilevel cars (e.g. Colorado Rail has 19 feet 9.5 inches (6.033 m) or 6033 mm). They typically are described as a traditional rail car with a second story. Most of these cars serve low platforms so they have exterior steps up to the traditional "over-wheel" floor height e.g. US 51 in (1,300 mm). End doors connect at the traditional height of existing rolling stock. Some cars have upstairs end doors as well. Upstairs and downstairs connect by interior stairs. These cars can fit the most able people, but lack level entry. Some cars are self-propelled Multiple Units so using traditional floor heights appears fixed. In towed cars it is possible to lower the downstairs floor between the wheels/bogies so that level entry is possible with more than 500 mm (19.7 in) of added headroom and interior steps from that floor to the traditional floor.
Read more about this topic: Bilevel Rail Car, Platform Height and Floor Height Issues
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