Regional Transportation District

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The Regional Transportation District is the transportation agency serving Denver, Colorado and surrounding areas. Service is provided in Boulder, Broomfield, Denver, and Jefferson Counties, as well as portions of Adams, Arapahoe, Douglas, and Weld Counties.

Timeline

  • Incorporated in 1969 by the Colorado General Assembly
  • Acquired bankrupt Denver Metro Transit in January 1974 and operated the service as 'DMT by RTD' until full integration occurred in September 1974
  • Longmont Mini Transit was purchased in July 1974
  • Englewood-Littleton-Ft. Logan Bus Line was purchased in November 1974
  • Northglenn Suburban Bus Co. was purchased in December 1974
  • Evergreen Transit was purchased in March 1975
  • Denver-Boulder Bus Company was purchased in June 1975 and began operating under RTD branding in January 1976
  • Boulder Public Services Co. was purchased in late 1975 and began operating under RTD branding in January 1976
  • Platte Division opens June 2, 1977
  • 16th Street Free MallRide began operating in October 1982
  • Market Street and Civic Center Stations opened in 1983 and 1984 respectively
  • Downtown Express Busway (later HOV lanes by 1996) opened in September 1994
  • Metro Area Connection (Central Corridor) Light Rail Line began operating on October 7th, 1994
  • Southwest Corridor Light Rail Line began operating on July 14th, 2000
  • Central Platte Valley Light Rail Line began operating on April 5th, 2002. Introduction of separate C Line and D Line designations
  • Southeast Corridor Light Rail Line began operating on November 17th, 2006
  • West Corridor Light Rail Line began operating on April 26th, 2013
  • Free MetroRide began operating on May 12th, 2014
  • Flatiron Flyer Bus Rapid Transit service began operating on January 2nd, 2016
  • East Corridor Commuter Rail Line began operating on April 22nd, 2016
  • Northwest Corridor Commuter Rail Line began operating on July 25th, 2016
  • I-225 Corridor Light Rail Line began operating on 2 February 24th, 2017
  • D Line service to 30th Avenue curtailed to 18th Street and replaced by L Line (109L) which began operating on January 14th, 2018
  • Gold Line (Commuter Rail) began operating on April 26th, 2019
  • North Metro Commuter Rail Line began operating on September 20th, 2020
  • 16th Street Free MallRide renamed to 16th Street FreeRide in May 2025

Routes

Bus Routes

Denver RTD operates many bus routes throught its service area. For a list of bus routes and operating divisions, see Denver Regional Transit District Bus routes and Divisions.

Commuter Rail

The A, B, and G lines are operated by Denver Transit Operators (DTO) from the Commuter Rail Maintenence Facility (CRMF). The N line is operated by the Regional Transportation District using the CRMF for maintenance and storage and the 711 call center for operations.

  • A Line: 111A - Denver International Airport to Union Station (opened April 2016; previously branded as University of Colorado A Line)
  • B Line: 113B - Westminster to Union Station (opened July 2016)
  • G Line: 113G - Wheat Ridge to Union Station (opened April 2019)
  • N Line: 117N - Thornton (Eastlake/124th) to Union Station (opened September 2020)

Light Rail

Current

All Light Rail trains are operated by the Regional Transportation District using the Elati and Mariposa Maintenence facilities.

  • D Line: 101D - Littleton/Mineral to 18th/California (service between 18th Street and 30th Avenue replaced by the L Line in January 2018)
  • E Line: 101E - Ridgegate Parkway to Union Station (extension from Lincoln to RidgeGate Parkway opened May 2019)
  • H Line: 101H - Florida to 18th/California (extension from Nine Mile to Florida station opened February 2017)
  • L Line: 109L - 16th/Stout to 30th/Downing
  • R Line: 107R - Peoria to Lincoln (formerly operated to RidgeGate Parkway until January 2021)
  • W Line: 103W - Jeffco Government Center/Golden to Union Station

Former

  • C Line: 101C - Littleton/Mineral to Union Station
  • F Line: 101F - Lincoln to 18th/California
  • J Line: 101J - Florida to Union Station (Never operated revenue service, announcements used for event service and H Line detours)

Transit Fleet

  • Current as of August 2025.

Active

Fleet
Number(s) 		Thumbnail Build
Date 		Manufacturer Model Engine Transmission Garage Notes
1501-1554 2013 MCI D4500CL Cummins ISX12 Allison B500R

Boulder: 16
East Metro: 20
Platte: 18

1651-1686 2016 BYD K10MR Platte: 36
1801-1812 2014 NFI XD60 Cummins ISL9 ZF 6AP1700B Platte: 12
  • Used on the Free MetroRide route.
3001-3025 2022 Gillig Low Floor 29'
(G27E102?2) 		Cummins L9
3601 2015 MCI D4500CT Cummins ISX12 Allison B500
  • Used for the Flatiron Flyer US36 BRT Service, among other routes.
3601-3659 2016 MCI D4500CT Cummins ISX12 Allison B500
  • Used for the Flatiron Flyer US36 BRT Service, among other routes.
3661-3674 2020 MCI D4500CT Cummins X12 Allison B500
  • Used for the Flatiron Flyer US36 BRT Service, among other routes.
3701-3742 2016 MCI D4500CT Cummins ISX12 Allison B500
6001-6125 2014 Gillig Low Floor 40'
(G27D102N4) 		Cummins ISL9 ZF 6AP1400B
6126-6299 2015 Gillig Low Floor 40'
(G27D102N4) 		Cummins ISL9 ZF 6AP1400B
6301-6340 2017 Gillig Low Floor 40'
(G27D102N4) 		Cummins L9 ZF 6AP1400B
6341-6355 2017-18 Gillig Low Floor 40'
(G27D102N4) 		Cummins L9 ZF 6AP1400B
  • 6341-6348 are 2017 models.
  • 6349-6355 are 2018 models.
6356-6415 2018 Gillig Low Floor 40'
(G27D102N4) 		Cummins L9 ZF 6AP1400B
6501-6580 2020 Gillig Low Floor 40'
(G27D102N4) 		Cummins L9 ZF 6AP1400B
  • First order to feature new livery.
  • 6501-6563 are 2020 models.
  • 6564-6580 are 2021 models.
6581-6697 2022-2023 Gillig Low Floor 40'
(G27D102N4z) 		Cummins L9
  • 6581-6584 are 2022 models.
  • 6585-6697 are 2023 models.
9301-9380 2014 NFI XD60 Cummins ISL9 ZF 6AP1700B
9381-9398 2015 NFI XD60 Cummins ISL9 ZF 6AP1700B
9401-9406 2016 NFI XD60 Cummins ISL9

Retired

Fleet
Number(s) 		Thumbnail Build
Date 		Manufacturer Model Engine Transmission Notes
1 1983 Neoplan USA AN440A Detroit Diesel 6V92TA Allison HT-747
  • Ex-Neoplan USA Demonstrator.
  • Retained as info bus for special events.
9-10 1997 Collins RE-185-D
6-15 1975 GMC T8H-5307A Detroit Diesel 8V71N Allison VS2-8
19-24 1975 GMC S8M-5304A Detroit Diesel 8V71N Manual
51-62 1974 FMC 2900V
63-89 1975 FMC 2900R
101-155 Renumbered 2301-2355.
214-227 1994 Metrotrans Classic
227-254 Renumbered 4401-4428.
431-434 1995 Ford/Goshen GC II
701-732 Renumbered 1401-1432.
771-782 Renumbered 1301-1312.
901-940 Renumbered 3401-3440.
1001-1014,
1016-1025 		1997 Collins RE-185-D
1102 1964 MCI MC-5A Detroit Diesel 8V71N
1103 1966 MCI MC-5A Detroit Diesel 8V71N
1105 1966 MCI MC-5A Detroit Diesel 8V71N
1106-1107 1967 MCI MC-5A Detroit Diesel 8V71N
1108-1110 1968 MCI MC-5A Detroit Diesel 8V71N
1111 1973 MCI MC-5B Detroit Diesel 8V71N
1201-1202 1969 MCI MC-7 Detroit Diesel 8V71
1203-1204 1971 MCI MC-7 Detroit Diesel 8V71
1205 1972 MCI MC-7 Detroit Diesel 8V71
1206-1207 1973 MCI MC-7 Detroit Diesel 8V71 Allison HT-740
1208-1209 1974 MCI MC-8 Detroit Diesel 8V71
1267-1269 1964 GMC TDH-5303 Detroit Diesel 6V71N Allison VH
1301-1312 1977 GMC P8M-4905A Detroit Diesel 8V71 4-speed Manual
  • Renumbered from 771-782.
  • Sold at auction in May 1998.
1401-1432 1978 MCI MC-8 Detroit Diesel 8V71
  • Renumbered from 701-732.
1401-1404 2006 Gillig BRT HEV 40'
(G19D102N4) 		Cummins ISB Allison EP40 hybrid system
1405-1409 2008 Gillig Low Floor HEV 40'
(G30D102N4) 		Cummins ISB Allison EP40 hybrid system
1501-1528 1987 Neoplan USA AN340/3 Detroit Diesel 6V92TA
1601 (1st) 1982 Neoplan N128/4 Super Skyliner
  • Ex-Neoplan/Neoplan USA demonstrator; bought circa 1987.
1601-1636 2000 TransTeq EcoMark CNG-Electric Hybrid
  • Used on 16th Street MallRide (now FreeRide).
1640-1641 2011 DesignLine EcoSaver IV
  • Used on 16th Street MallRide (now FreeRide).
1701-1721 1991 MCI 102-A3
1702-1722 1960 GMC TDH-4516 Detroit Diesel 6V71N Allison VH
1801-1820 1993 Neoplan USA AN340/3 Detroit Diesel 8V92TA Allison HT-741
1901-1971 1997 MCI 102-DL3 Allison B500R
1991-1996 2010 MCI D4500CL Cummins ISM Allison B500R
2001-2303 2000 OBI Orion V
(05.501) 		Cummins ISM ZF 6HP592C
Allison B400R
2101-2110 1964 GMC TDH-5303 Detroit Diesel 6V71N Allison VH9
  • Renumbered from 260-269.
  • Ex-Dallas Transit System, acquired in the mid 1970s.
  • Converted to wheelchair buses to carry passengers in wheelchairs.
2301-2355 1977 Flxible 35096-6-1 Detroit Diesel 6V71N Allison V730
2501-2506 1982 Minicars/Walter Vetter
(MCR/Vetter) 		7000E
  • Battery-powered.
  • Used on the 16th Street Free MallRide (now FreeRide).
2507-2519 1982 Minicars/Walter Vetter
(MCR/Vetter) 		7000D
  • 2507-2509 were 1981 models.
  • Used on the 16th Street Free MallRide (now FreeRide).
2520-2526 1985 Minicars/Walter Vetter
(MCR/Vetter) 		7000D
  • Used on the 16th Street Free MallRide (now FreeRide).
2601 1992 Neoplan USA
  • MallRide prototype bus.
2701-2706 2008 Blue Bird Express Caterpillar Allison B500R
  • 2009 models
  • Purchased in 2009 from Coachworks as buses undelivered to another operator.
2801-2885 2001 Neoplan USA AN345/3 Detroit Diesel Series 60 Allison B500R
3001-3020 1992 Gillig Phantom 40'
(40102TB6V92TA) 		Detroit Diesel 6V92TA
3101-3110 1975 GMC T8H-5307A Detroit Diesel 8V71N Allison VS2-8
3251-3295 1999 Eldorado National Escort RE Cummins ISC
3401-3440 1976 AMG 10240B-8 Detroit Diesel 8V71N Allison V730
  • Renumbered from 901-940.
  • Suburban configuration.
3701-3710 1990 Marcopolo
Stewart and Stevenson 		Senior
Starship S-28
3711-3715 1990 Marcopolo
Stewart and Stevenson 		Senior
Starship S-28 CNG 		Ford 460
3716-3730 1990 Ferroni
Stewart and Stevenson 		Gemini T-30
3801-3815,
3820-3834,
3841-3891 		2000 Gillig Phantom 30'
(C18A102N4) 		Cummins ISC ZF 6HP502C
  • View the series page for detailed disposition info.
3901-3950 2006 Gillig Low Floor 29'
(G29E102R2) 		Cummins ISL
3951-3963 2006 Gillig Low Floor 29'
(G27E102R2) 		Cummins ISL
  • 3951 was a 2006 model.
  • 3952-3963 were 2007 models.
3964-3976 2008 Gillig Low Floor 29'
(G27E102R2) 		Cummins ISL
4101-4113 1963 GMC TDH-5303 Detroit Diesel 6V71N Allison VH
4114-4120 1962 GMC TDH-5301 Detroit Diesel 6V71N Allison VH
4301-4326 1972 Flxible 111CC-D06-1 Detroit Diesel 8V71N Allison VS2-8
4401-4428 1974 Flxible 53102-8-1 Detroit Diesel 8V71N Allison VS2-8
  • Ex Denver Metro Transit 4401-4428.
  • Renumbered from 227-254 upon delivery.
  • 4427 was found parted out at David's Auto Salvage in Abilene, TX in March 2016. It originally was being converted into an RV by a private owner.[1]
4501-4583 1975 AMG 10240A-8 Detroit Diesel 8V71N Allison VS2-8
  • Renumbered from 601-683 in 1982.
4601-4776 1977 AMG 10240B-8 Detroit Diesel 8V71N Allison V730
  • Renumbered from 301-476 in 1982.
  • 12 units to Community Transit 302-313 in 1990.
  • 1 unit was bought by a private owner for an RV conversion project. It was never completed. It was listed on Facebook Marketplace in non-operational condition in Denver, CO in January 2021.[2]
4801-4927 1981 GMDD T6H-5307N Detroit Diesel 6V92TA Allison V731
  • Sutrak A/C added on.
  • Sold at auction in May 1998.
5001-5165 1986 Neoplan USA AN440A Detroit Diesel 6V92TA
Detroit Diesel Series 50 		Allison HTB-748
  • View the series page for detailed disposition info.
5001-5103 2005 Gillig Low Floor 40'
(G21D102N4) 		Cummins ISM ZF 6HP592C
5104-5133 2006 Gillig Low Floor 40'
(G21D102N4) 		Cummins ISM ZF 6HP592C
5134-5236 2006-2007 Gillig Low Floor 40'
(G21D102N4) 		Cummins ISM ZF 6HP592C
5166-5167 1986 Neoplan USA AN440A Detroit Diesel 6V92TA
Detroit Diesel Series 50 		Allison HTB-748
  • Ex-Neoplan USA demonstrator units.
  • View the series page for detailed disposition info.
5201-5305 1987 Neoplan USA AN440A Detroit Diesel 6V92TA
Detroit Diesel Series 50 		Allison HTB-748
  • View the series page for detailed disposition info.
5237-5265 2008 Gillig Low Floor 40'
(G27D102N4) 		Cummins ISL ZF 6HP592C
6001-6005 1988 TMC RTS-06 Methanol
(T80-206) 		Detroit Diesel 6V92TA
7001-7040 1992 Flxible Metro "C"
(40102-6T) 		Detroit Diesel 6V92TA
7041-7045 1992 Flxible Metro "C"
(40102-6TL) 		Detroit Diesel 6L71TA Allison V731
8001 (1st) 1986 Neoplan USA AN460A Detroit Diesel 6V92TA Allison HT-747
  • Ex-Demonstrator.[3]
8001-8085,
8101-8136,
8201-8256,
8301-8344 		1993-1994 Gillig Phantom 40'
(40/102TB S50) 		Detroit Diesel Series 50 ZF 4HP590
Allison B400R
  • 8001 was a 1993 model.
  • View the series page for detailed disposition info.
9001-9089 1983-1984 MAN SG-310-18-2A MAN D2566 MLUM Renk-Doromat 874B
9101-9219 2000 NABI 436.09 Cummins ISM ZF 6HP602C
  • View the series page for detailed disposition info.

Rail Roster

Active

Light Rail

Fleet number(s) Thumbnail Year Manufacturer Model Motors Notes
101-111 1993-94 Siemens SD100 Siemens
112-117 1996 Siemens SD100 Siemens
118-131 1999 Siemens SD100 Siemens
132-149 2000-01 Siemens SD100 Siemens
201-234 2006 Siemens SD-160 Siemens
235-323 2009-2012 Siemens SD-160 Siemens
324-352 2018-2020 Siemens SD-160 Siemens

Heavy Rail

Fleet number(s) Thumbnail Year Manufacturer Model Motors Notes
4001-4066 2014-2016 Hyundai Rotem EMU

External Links

References

  1. ↑ www.youtube.com
  2. ↑ www.facebook.com
  3. ↑ [1]
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