Have been searching for some historical info on the UP concerning their passenger train colors. When the 2 tone gray Challenger was in service, did it pull a passenger consist and was that consist heavyweights (what color?) , modern lightweights in aluminum, or yellow livery or some other color? Thanks
As a general timeline, Union Pacific used the following colors on its passenger equipment.
Dark Olive -- Early Harriman Era (ca. 1903) until 1952
Yellow and Brown -- 1934 to 1940 (Streamliners only)
Yellow and Gray -- 1940 to today (Streamliners only until 1952, then all passenger equipment)
Two-Tone-Gray -- 1946 to 1952 (overnight trains only)
See:
https://utahrails.net/up/up-paint-index.php
for more details.
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