Editing Union Pacific Railroad (section)

==Locomotives and rolling stock==
Union Pacific has owned some of the most powerful locomotives. These include members of the Challenger-type (including [[Union Pacific 3985|the 3985]]), and the Northern-type (including [[Union Pacific 844|the 844]]), as well as the [[Union Pacific Big Boy|Big Boy]] steam locomotives (including [[Union Pacific 4014|the 4014]]). Union Pacific ordered the [[M-10000|first diesel streamliner]], the [[Union Pacific GTELs|largest fleet of turbine-electric locomotives in the world]], and the [[EMD DDA40X|largest diesel locomotives ever built]] (including [[Union Pacific 6936|6936]]).<ref>{{Cite book |last=Brian Solomon |url=https://books.google.com/books?id=d-KLEjzWUq8C&pg=PA91 |title=Union Pacific Railroad |date=1981 |publisher=Voyageur Press |isbn=9781610605595 |page=91}}</ref>

===Paint and colors===
[[File:UP 9214 19910510 CA Cajon.jpg|thumb|Union Pacific #9214, a [[GE Dash 8-40C]], shows the standard UP diesel locomotive livery on May 10, 1991]]

The yellow paint scheme was introduced in the spring of 1934. Engineers claimed the visibility of yellow would reduce [[Level crossing|grade crossing]] accidents.<ref>{{Cite book |url=https://books.google.com/books?id=lw8TAAAAIAAJ |title=Union Pacific Bulletin |date=1950 |publisher=UPRR |pages=13 |quote=New Dress for Spring in 1934. Since that time, all streamliner passenger equipment has been painted the ... Yellow is widely used where high visibility is desired as a safety feature. Union Pacific engineers claim that use of yellow on U.P. trains will further reduce the incidence of grade crossing accidents, especially at night. Nighttime visibility is increased still more by use of red reflection Union}}</ref> In 1941, UP introduced its yellow and gray color scheme with red highlights, which remains in use today.<ref>{{Cite book |last=Welsh |first=Joe |url=https://books.google.com/books?id=C8JEdu10NDEC&pg=PA59 |title=Union Pacific's Streamliners |publisher=Voyageur Press |isbn=978-1-61673-115-1 |pages=59}}</ref>

The middle two-thirds of the locomotive body is painted ''Armour Yellow'',<ref>{{Cite web |last=Strack |first=Don |date=August 25, 2015 |title=Armour Yellow on Union Pacific |url=https://utahrails.net/up/armour-yellow.php |access-date=June 23, 2022 |website=UtahRails.net}}</ref> a color used by [[Armour and Company]] on the packaging of its meat products. A thin band of ''Signal Red'' divides this from the ''Harbor Mist Gray'' (a light gray) used for the body and roof above that point. There is also a thin band of Signal Red along the bottom of the locomotive body, but this color has gradually become yellow as new Federal Railroad Administration (FRA) regulations for reflectorized tape came into effect in 2005; the trucks (painted Aluminum from 1955 to 1982), underframe, fuel tanks and everything else beneath that line are also Harbor Mist Gray. Lettering and numbering are in Signal Red, with black outlines. Most locomotives have white-outlined blue "wings" on the nose, on either side of the renowned shield featuring white lettering on a blue background and, below it, red and white vertical stripes. Beginning in early 2002, a number of units were repainted with a large, billowing [[Flag of the United States|American flag]] with the corporate motto "Building America" on the side, where the 'UNION PACIFIC' lettering is normally positioned.{{Citation needed|date=October 2020}}

[[File:UP Loco No.5645.jpg|thumb|UP [[GE AC4400CW]] #5645 in [[Battle Creek, Michigan]], with the Flags and Flares paint scheme]]
[[File:Union Pacific Railroad Bridge at Multnomah Falls.jpg|thumb|Union Pacific #5391, approaching bridge at [[Multnomah Falls]], Oregon, shows the white-outlined blue "wings" on the nose.]]
[[File:UP 6419.jpg|thumb|Union Pacific #6419, in [[Checotah, Oklahoma]], with the Flags and Flares paint scheme leads a train on June 26, 2021]]

====Merger partner locomotives====
[[File:UP GP38-2 588.jpg|thumb|A former Southern Pacific [[EMD GP38-2|GP38-2]] locomotive renumbered with UP "patch" markings]]

Until 2017, UP operated some locomotives still in the paint scheme of their former railroads. In addition, some locomotives were renumbered by UP, varying in the degree of the previous railroads' logos being eradicated, but always with a yellow patch applied over the locomotive's former number and a new UP number applied on the cab. That allowed UP to number locomotives into its roster without spending the time and money necessary to perform a complete repaint. In May 2015, UP rostered 212 "patches", consisting of:
* 22 Chicago and North Western (whose CNW logos have been hidden by the "patches"),
* 174 Southern Pacific (AC4400CW, GP40-2, MP15AC, and GP60)
* 14 St. Louis Southwestern (GP60)
* 2 Denver and Rio Grande Western (GP60)
*While not technically a predecessor locomotive in the traditional sense, UP also rostered a single SD40-2 (3564, since retired) still in the 1970s paint scheme, not counting DDA40X No. 6936, which was part of the [[Union Pacific Heritage Fleet]] until 2022.

In 2017, Union Pacific decided to repaint all locomotives which were not in the current corporate colors. {{As of|2018|03|post=,}} only 41 locomotives remained unpainted.<ref>{{Cite journal |last=Guss |first=Chris |date=March 2018 |title=Perfecting a unified look |journal=[[Trains (magazine)|Trains]] |volume=78 |issue=3 |pages=14 |id={{ProQuest|1988415135}}}}</ref>

====Commemorative color schemes====
From the second half of 2005 to the summer of 2006, UP unveiled a new set of six [[EMD SD70ACe]] locomotives in "Heritage Colors", painted in schemes reminiscent of railroads acquired by the Union Pacific Corporation since the 1980s. The engine numbers match the year that the predecessor railroad became part of the Union Pacific system. The locomotives commemorate the [[Missouri Pacific Railroad|Missouri Pacific]] with [[Union Pacific 1982|UP 1982]], the [[Western Pacific Railroad|Western Pacific]] with [[Union Pacific 1983|UP 1983]], the [[Missouri–Kansas–Texas Railroad|Missouri–Kansas–Texas]] with [[Union Pacific 1988|UP 1988]], the [[Chicago and North Western Railway|Chicago and North Western]] with [[Union Pacific 1995|UP 1995]], the [[Southern Pacific Railroad|Southern Pacific]] with [[Union Pacific 1996|UP 1996]], and the [[Denver and Rio Grande Western Railroad|Denver and Rio Grande Western]] with [[Union Pacific 1989|UP 1989]].<ref>{{Cite press release |title=Denver & Rio Grande Western Colors Again Ride the Rails |date=June 19, 2006 |publisher=Union Pacific Railroad |url=http://www.uprr.com/newsinfo/releases/heritage_and_steam/2006/0619_drgw.shtml |access-date=April 20, 2010}}</ref>

In October 2005, UP unveiled SD70ACe [[Union Pacific 4141|4141]], commissioned in honor of [[George H. W. Bush|George Bush]]. The locomotive has "[[George H. W. Bush|George Bush]] 41" on the sides and its paint scheme resembles that of [[Air Force One]]. It was sent into storage in 2007, but returned in 2018 to power Bush's [[funeral train]]. It was donated to the [[George H. W. Bush Presidential Library and Museum]] on November 8, 2019.<ref>{{Cite web |last=Wrinn |first=Jim |date=November 8, 2019 |title=Union Pacific donates SD70ACe No. 4141 to George H.W. Bush Presidential Library; Big Boy 4014 joins celebration |url=http://trn.trains.com/news/news-wire/2019/11/08-union-pacific-donates-sd70ace-no-4141-to-george-hw-bush-presidential-library-big-boy-4014-joins-celebration |url-status=dead |archive-url=https://web.archive.org/web/20200928085323/https://trn.trains.com/news/news-wire/2019/11/08-union-pacific-donates-sd70ace-no-4141-to-george-hw-bush-presidential-library-big-boy-4014-joins-celebration |archive-date=September 28, 2020 |access-date=November 8, 2019 |website=TrainsMag.com}}</ref><ref>{{Cite web |title=Union Pacific Donates George H.W. Bush Engine 4141 To The Bush Library And Museum |url=http://wtaw.com/2019/11/08/union-pacific-donates-george-h-w-bush-engine-4141-to-the-bush-library-and-museum/ |url-status=dead |archive-url=https://web.archive.org/web/20191109191604/http://wtaw.com/2019/11/08/union-pacific-donates-george-h-w-bush-engine-4141-to-the-bush-library-and-museum/ |archive-date=November 9, 2019 |access-date=November 9, 2019 |website=wtaw.com}}</ref>

On March 31, 2010, UP dedicated a specially painted [[GE Evolution Series|GE ES44AC]] locomotive commemorating the centennial of the [[Boy Scouts of America]].<ref>{{Cite press release |title=Union Pacific Railroad Unveils No. 2010 Boy Scouts of America Commemorative Locomotive |date=March 31, 2010 |publisher=Union Pacific Railroad |url=http://www.uprr.com/newsinfo/releases/community/2010/0331_boyscouts.shtml |access-date=April 20, 2010}}</ref>

On September 28, 2010, UP dedicated a specially painted [[GE Evolution Series|GE ES44AC]] locomotive, as a tribute to [[Susan G. Komen for the Cure]].<ref>{{Cite press release |title=Union Pacific Railroad Unveils Its Pink Ribbon Locomotive |date=September 28, 2010 |publisher=Union Pacific Railroad |url=http://www.uprr.com//newsinfo/releases/community/2010/0928_pinkribbon.shtml |access-date=May 12, 2012}}</ref>

On October 19, 2017, Union Pacific unveiled [[EMD SD70 series|SD70AH]] 1943, "The Spirit of the Union Pacific", which is painted in a scheme to honor the United States armed forces.<ref>{{cite magazine |last1=Cotey |first1=Angela |title=‘Spirit of the Union Pacific’ is the newest heritage unit |magazine=Trains |date=October 19, 2017 |url=https://www.trains.com/trn/news-reviews/news-wire/19-union-pacific-heritage-unit/ |access-date=2 December 2024}}</ref>

On June 6, 2019, Union Pacific unveiled [[EMD SD70 series|SD70ACe]] 1111, the "Powered By Our People" unit.<ref>{{Cite web |title=UP unveils 'Powered by our People' special paint scheme &#124; Trains Magazine |url=http://trn.trains.com/news/news-wire/2019/06/06-up-unveils-powered-by-our-people-special-paint-scheme |url-status=dead |archive-url=https://web.archive.org/web/20190608110048/http://trn.trains.com/news/news-wire/2019/06/06-up-unveils-powered-by-our-people-special-paint-scheme |archive-date=June 8, 2019 |access-date=June 8, 2019}}</ref>

In April 2021, Union Pacific repainted an [[EMD SD70 series|SD70M]] into a commemorative paint scheme called "We Are ONE" to honor Juneteenth and Pride Month.<ref>{{Cite web |date=May 27, 2021 |title="We Are ONE" Commemorative Locomotive Debuts |url=https://www.up.com/aboutup/community/inside_track/we-are-one-1979-210527.htm |access-date=April 15, 2022 |publisher=Union Pacific}}</ref>

UP also has a collection of locomotives painted for [[Operation Lifesaver]], a rail safety organization founded in 1970.<ref>{{Cite news |last1=Bogdanich |first1=Walt |last2=Nordberg |first2=Jenny |date=January 23, 2005 |title=Highway Agency Disavows Claims by Rail Safety Group |url=https://www.nytimes.com/2005/01/23/us/highway-agency-disavows-claims-by-rail-safety-group.html |access-date=June 23, 2022 |work=The New York Times |issn=0362-4331}}</ref>

===Locomotive roster===
As of December 2023, the Union Pacific had 7,175 locomotives on its active roster consisting of 42 different models.<ref>{{Cite web |date=December 2023 |title=Union Pacific Locomotive Roster |url=https://www.up.com/aboutup/funstuff/locomotive-roster/index.htm |url-status=live |archive-url=https://web.archive.org/web/20240104211824/https://www.up.com/aboutup/funstuff/locomotive-roster/index.htm |archive-date=4 January 2024 |access-date=19 March 2024 |website=UP.com}}</ref>
{| class="wikitable sortable"
|-
! Type !! Quantity
|-
| [[GE Dash 8-40C|C40-8]]|| 3
|-
| [[GE Dash 8-40CW|C40-8W]]|| 7
|-
| [[GE Dash 8-40CW|C41-8W]]|| 28
|-
| [[GE Dash 9-44CW|C44-9W]]|| 217
|-
| [[GE AC4400CW|C44AC]]|| 511
|-
|[[GE AC4400CW#Rebuilds|C44ACCTE]]
|543
|-
|[[GE AC4400CW#Rebuilds|C44ACM]]
|655
|-
| [[GE Evolution Series#ES44AC (2003–present)|C45ACCTE]]|| 937
|-
|[[GE Evolution Series#ES44AC (2003–present)|C45AH]]
|465
|-
|[[Remote control locomotive#North America|CCRCL]]
|6
|-
|[[EMD E9|E9]]
|2
|-
| [[EMD GP15-1|GP15-1]]|| 46
|-
|[[EMD GP15#Rebuilds|GP15N]]
|22
|-
|GP22
|10
|-
| [[EMD GP38-2|GP38-2]]|| 85
|-
| [[EMD GP38-2#Rebuilds|GP38N]]|| 167
|-
| [[EMD GP39-2|GP39-2]]|| 10
|-
|[[EMD GP39-2#Rebuilds|GP39N]]
|7
|-
| [[EMD GP40-2|GP40-2]]|| 61
|-
|[[EMD GP40-2#Rebuilds|GP40N]]
|129
|-
|GP59ECO
|1
|-
| [[EMD GP60|GP60]]|| 137
|-
|GP60E
|33
|-
|GP62
|16
|-
| [[EMD MP15AC|MP15AC]]|| 1
|-
|PS4B
|1
|-
|PS6B
|67
|-
|RP18G
|14
|-
| [[EMD SD40-2|SD40-2]]|| 2
|-
|[[EMD SD40-2#SD40N|SD40N]]
|486
|-
|SD59MX
|28
|-
| [[EMD SD60|SD60]]|| 45
|-
|SD60E
|1
|-
| [[EMD SD60|SD60M]]|| 132
|-
|SD62
|18
|-
|SD62E
|13
|-
| [[EMD SD70 series#SD70ACe (2004–present)|SD70ACe]]|| 510 
|-
|[[EMD SD70 series#SD70ACe-T4 (2015–present)|SD70AH]]
|368
|-
| [[EMD SD70 series|SD70M]]|| 1,365
|-
| [[EMD SD90MAC|SD9043AC]]|| 23
|-
| SNOW PLOW|| 1
|-
|STEAM
|2
|}

====Heritage equipment====
{{Main|Union Pacific heritage fleet}}

Union Pacific continues to use a small number of "heritage" steam locomotives and early streamlined diesel locomotives. This equipment is used on special charters (excursions).<ref>{{Cite web |title=UP: Steam |url=https://www.up.com/aboutup/special_trains/steam/index.shtml |access-date=September 7, 2018 |publisher=Union Pacific}}</ref><ref>{{Cite web |title=E-9 Streamliners |url=https://www.up.com/aboutup/special_trains/diesel-electric/e9_streamliner/index.htm |access-date=September 7, 2018 |publisher=Union Pacific}}</ref>
{| class="wikitable sortable"
|-
! Type !! Quantity
|-
| [[4-8-8-4]] [[Union Pacific Big Boy|Big Boy]]|| 1
|-
| [[4-8-4]] [[Union Pacific FEF Series|FEF-3]]|| 1
|-
| [[EMD E9|E9A]]|| 2
|-
| [[EMD E9|E9B]]|| 1
|}
[[File:UP 4014 Friesland, WI (48379660372).jpg|thumb|Big Boy #4014 passes through [[Friesland, Wisconsin]], on July 25, 2019.]]

====Low-emissions locomotives====
Union Pacific maintains a fleet of low-emissions locomotives. Most are used in Los Angeles basin rail yards, to satisfy an air quality agreement with the local authorities.<ref>{{Cite web |title=New Ultra-Low Emission Locomotive Goes to Work in Union Pacific's Los Angeles Basin Rail Yards |url=https://www.uprr.com/newsinfo/releases/environment/2007/0131_ultralow.shtml |access-date=January 19, 2017 |publisher=Union Pacific}}</ref><ref>{{Cite journal |last=Guss |first=Chris |date=August 2018 |title=Few flowers for gensets |journal=[[Trains (magazine)|Trains]] |volume=78 |issue=8 |pages=18–19 |id={{ProQuest|2056018178}}}}</ref>[[File:UNION PACIFIC Y2513 20070228.jpg|thumb|One of the 20 new {{convert|2000|hp}} "[[Railpower GG20B|Green Goat]]" locomotives manufactured for Union Pacific's "Green" Fleet by [[Railpower Technologies]]]]
{| class="wikitable sortable"
|-
! Type !! Quantity
|-
|[[NRE 2GS14B|2GS14B]]|| 1
|-
|[[Progress Rail EMD24B|GP22T4]]|| 10
|-
|[[MPI MP20B|MP20B]]|| 13
|-
|[[3GS21B]]|| 59
|-
|[[Progress Rail PR30C|PR30C]]|| ≥6
|-
|[[GG20B|GG20GE]]||21
|-
|Others|| ≤71 
|}