Tram systems in Houston
Houston is the largest city in Texas, situated in the southeastern part of the state near the Gulf Coast of the United States. It is a major centre for energy, international trade, medicine and aerospace, with a large port and strong associations with NASA’s Johnson Space Center. Its extensive urban area includes a high-rise downtown, established residential neighbourhoods and numerous outlying business districts.
Public transport in Houston is centred on METRO’s bus and light rail networks. Local buses provide coverage across the city and surrounding communities, while Park & Ride express buses connect suburban parking facilities with major employment centres. METRO also provides community transport, on-demand services and accessible transport for eligible passengers.
METRORail serves several of the city’s busiest central corridors, connecting Downtown with residential areas, universities, museums and the Texas Medical Center. Interchanges with buses extend its reach across the wider urban area. Both George Bush Intercontinental Airport and William P. Hobby Airport are served by METRO buses, including the 500 Downtown Direct airport service.
Houston’s modern light rail system operates under the METRORail name and comprises three colour-coded lines.
The Red Line runs between Northline Transit Center / HCC and Fannin South, passing through Downtown, Midtown, the Museum District and the Texas Medical Center. It forms the principal north–south rail corridor through the central city.
The Green Line connects the Theater District with Magnolia Park Transit Center, serving East Downtown and the East End. The Purple Line also starts in the Theater District, running southeast through the Third Ward and the Texas Southern University and University of Houston area to Palm Center Transit Center.
The Green and Purple lines share their central section between the Theater District and EaDo / Stadium. Connections with the Red Line are available at Central Station, using the nearby platforms on Main Street, Capitol Street and Rusk Street.
Houston currently has 3 tram lines, details of which can be found on the Lines tab.
The network is operated by the Metropolitan Transit Authority of Harris County, Texas, generally known as METRO. The authority is responsible for METRORail and the principal bus network serving Houston, much of unincorporated Harris County and participating surrounding cities.
Useful official links:
Houston’s streetcar history began in 1868 with mule-drawn cars. During the following decades, animal-powered street railways developed into a network connecting the city centre with its growing outskirts. Electric streetcars were introduced in 1891, allowing faster journeys and supporting expansion beyond the compact early city.
The electric network became an important influence on Houston’s development. Lines helped establish residential districts such as Houston Heights and Montrose by providing convenient access to downtown employment and shops. The Montrose line opened in 1912, illustrating the close relationship between streetcar construction and suburban development.
Alongside the urban streetcar network, electric interurban railways connected Houston with neighbouring communities. The Galveston–Houston Electric Railway opened in December 1911, providing a direct link between the two cities. It continued operating until October 1936; part of its former alignment was subsequently used for the Gulf Freeway.
The Houston North Shore Railway opened in 1927, linking Houston with the Goose Creek and Baytown area. Its electric passenger cars initially used city streetcar tracks to reach downtown, but this arrangement ended in 1931, after which passengers transferred to buses at the railway’s eastern Houston terminus. Electric operation continued until 1948, when railbuses replaced the interurban cars.
Houston’s urban streetcars faced increasing competition from motor vehicles and buses. Bus replacement began during the 1920s, and the remaining city streetcar services closed in 1940. Public transport subsequently depended on buses, while the expanding city developed increasingly around private cars and its freeway network.
METRO began operating in 1979, taking over the former HouTran bus system. Construction of its first modern light rail line began in March 2001, marking the start of a new era of urban rail transport in Houston.
The initial METRORail line opened on 1 January 2004. Running between UH-Downtown and Fannin South, it covered approximately 12 kilometres (7.5 miles) and served 16 stations. The route connected Downtown with Midtown, the Museum District, the Texas Medical Center and the stadium area, forming the original section of today’s Red Line.
On 21 December 2013, the Red Line was extended north from UH-Downtown to Northline Transit Center / HCC. This brought light rail into the Near Northside and extended the original north–south corridor.
The Green and Purple lines opened on 23 May 2015, transforming METRORail from a single route into a three-line network. The Green Line served the East End, while the Purple Line connected Downtown with the Third Ward, university districts and Palm Center. The two new lines shared tracks through the city centre.
The Green Line initially stopped short of Magnolia Park while work continued on the Harrisburg overpass across a freight railway. The final section opened on 11 January 2017, adding the last two stops and completing the route to Magnolia Park Transit Center. This established the three-line network’s present extent.
Houston currently has 3 tram lines, which are listed below.
| Line | Description |
|---|---|
| Red | The Red line runs between Northline Transit Center / HCC and Fannin South via Downtown, Midtown and the Texas Medical Center. |
| Green | The Green line runs between Theater District and Magnolia Park Transit Center via Downtown, EaDo / Stadium and the East End. |
| Purple | The Purple line runs between Theater District and Palm Center Transit Center via Downtown, Third Ward and the University of Houston. |
Houston’s METRORail network uses standard-gauge track of 1,435 mm and overhead electrical supply collected by pantographs. METRO’s current technical specifications identify a nominal traction voltage of 750 V DC. The infrastructure combines embedded track in paved streets with conventional ballasted track on separate alignments.
Much of the network runs at street level, with road crossings controlled by traffic signals. The Green and Purple lines share tracks through Downtown, using separate streets for the two directions along Capitol Street and Rusk Street. The Green Line also crosses a freight railway on the Harrisburg overpass, which enabled the route to be completed to Magnolia Park.
Stations have low platforms suited to the fleet’s accessible entrances. At Central Station, interchange between the Red Line and the Green and Purple lines involves a short walk between the platforms on Main Street and those on Capitol Street or Rusk Street.
The fleet comprises four vehicle series, designated H1 to H4 by METRO. All are articulated light rail vehicles with low-floor passenger areas. The different generations reflect the opening of the original line, subsequent network expansion and later additions to the fleet.
The H1 and H2 series are Siemens S70 vehicles. The original H1 fleet entered service with the opening of METRORail in 2004. The H2 vehicles followed from 2012 and use a shorter version of the S70 design.
The H3 series was supplied by CAF USA and entered service in 2015, alongside the expansion to a three-line network. These vehicles form a separate fleet type from the Siemens-built cars.
The newest H4 series consists of Siemens S700 vehicles, introduced from 2022. Their revised interior provides wider aisles and improved circulation through the low-floor area, with more convenient accommodation for wheelchairs, pushchairs and bicycles.