A comfort cab is a design found on most modern

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, and some export models. The broad nose occupies the entire width of the locomotive, and typically has an access door on the front of the nose. The design may also be called a ''Canadian comfort cab'', a ''North American safety cab'', ''wide-nose'', or a ''wide cab'' (although the term ''wide cab'' is somewhat of a misnomer because it is the nose, not the cab, that is widened).

History

The basic shape of the comfort cab design first appeared on a

hood unit A hood unit, in North American railroad terminology, is a body style for diesel and electric locomotives where the body is less than full-width for most of its length and walkways are on the outside. In contrast, a cab unit has a full-width ca ...

, the EMD DDA40X, in 1969. It was the same design as the F45 and FP45

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s being built by EMD at the time. The cab used on the DDA40X was not a true "Safety cab" because it consisted mainly of restyled sheet metal and lacked the structural reinforcements of the Canadian design. The first true "Safety cabs" were designed and built for the

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by input from railway employees. The locomotives were GP38-2s, GP40-2s and GP40-2Ls, and SD40-2s. To denote the comfort cab locomotives, a "W" was often applied at the end of the model name (i.e. GP38-2W, GP40-2W, SD40-2W), although this was not an official designation. The

Montreal Locomotive Works Montreal Locomotive Works (MLW) was a Canadian railway locomotive manufacturer that existed under several names from 1883 to 1985, producing both Steam locomotive, steam and diesel locomotives. For many years it was a subsidiary of the American ...

also offered a competitive cab design on their M-420 and M-630(W) models. EMD began offering the comfort cab as a standard option instead of a custom build option in 1988.

Features

The comfort cab design has a number of features to improve crew safety and comfort.

Safety

The modern comfort cab design is usually built with a specially reinforced nose. Instead of sheet metal, steel is employed with additional reinforcement behind the armor. As a moving locomotive frequently cannot stop in time to prevent collisions, these enhancements protect the crew in collisions with objects smaller than the train itself, such as downed trees or stopped automobiles. In addition, the windows of the cab meet

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Regulations Part 223, which states that windows must withstand the impact of a .22 caliber bullet or a

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at .

Comfort

The comfort cab design provides more space for the crew. It has significantly more open space than standard cabs, allowing crew members space to move about. In later years, the cab doors had improved weatherstripping and electrically heated windows installed. Many new EMD locomotives include the feature of the "Whisper Cab", a cab that is acoustically isolated from the rest of the

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References

{{reflist Locomotive parts Railway safety