The Southern California Regional Rail Authority (Metrolink) is an environmentally-conscious public transit provider. We offer rail transportation that is not only safe, on-time, convenient and a good value; but also environmentally friendly. Metrolink is committed to offering high-quality public transit service while minimalizing our environmental impact. We strive to meet these commitments with continually improving our efforts in the following areas: 

Sustainable Transportation

Multimodal Connections

Sustainable Choices and Innovations


Environmental Accountability

Future Initiatives


Have a sustainability idea for Metrolink?  Email us at

For information regarding our safety measures and policies, please visit our safety page here

For information regarding our innovations, please visit our innovations page here


Sustainable Transportation

By offering an alternative to automobile transportation, Metrolink plays an integral part in reducing vehicle emissions and traffic congestion in Southern California. We strive to make our regional transportation system more sustainable by providing affordable and quality public transportation, thereby reducing the need for automobile and fuel usage. These ideas help conserve resources, thus making Metrolink the choice for sustainable transportation. 

*This figure is derived from average station boardings multiplied by car availability, divided by average people per car with annualization.

Measuring Your Carbon Footprint

Be more environmentally friendly by riding Metrolink. Metrolink riders avoid 178,200 metric tons of CO2 emissions each year (CALPIRG 2008). 

Back to the top


Multimodal Connections

Metrolink is committed to the goal of cleaner air in Southern California. We work with various transportation agencies throughout the region to offer our riders more sustainable and efficient ways to reach their Southern California destinations.



Metrolink encourages all riders to utilize bicycle transportation.

Metrolink currently averages 22,000 bikes on our trains per month. 

Metrolink offers expanded bicycle service for CicLAvia, transportation bikes and riders to a series of large-scale bike-friendly events in Los Angeles.  Metrolink is committed to offering riders the best bicycling experience, and are working hard to support the continuing growth of bicycle travel throughout Southern California.

For more information about our green Bike Cars, please click here.


Buses and Urban Rail

Metrolink continues to work with various transit agencies in Southern California to improve public transit connectivity. Riders with a valid Metrolink ticket can transfer for free to all Metro buses and rail, some Metro-sponsored shuttles and many municipal buses in the following counties:

Metrolink passes and tickets are now compatible with TAP-enabled fare gates in LA County, offering a simpler and smarter way for riders to connect to Metro Rail and Metro buses. About half of the Metrolink riders utilize this service to connect to their destinations. For a complete list of our free connection participants, please visit our Transit Connections Page.

Back to the top


Sustainable Choices and Innovations

Although Metrolink prides itself on its commitment to a more sustainable and clean Southern California, we believe that we should all strive to do more. We continue to assess and evaluate our choices to reduce the impact of our operations and to find new ways to provide sustainable transit for our riders.

Our People

Through our Corporate Partner Program, we work with approximately 150 companies around Southern California to aid their employees in commuting to work using public transportation. Employers and employees receive tax incentives to help encourage environmentally friendly transportation in businesses across all six counties.  To learn more about our Corporate Pass Program please contact Laurene Lopez at

Our Neighbors

Metrolink is dedicated to serving the region’s transportation needs while remaining a good neighbor to communities surrounding our rights-of-way and other facilities. We continue to examine our maintenance and service operations and implement solutions that maximize our efficiency and minimize our noise and other environmental impacts.

For more information about our efforts at the Central Maintenance Facility in Los Angeles, see the “Fuel Conservation Program” section below or please click here.

Sustainable Vehicles

Metrolink currently operates 172 support vehicles. Our fleet vehicles include electric, hybrid, low-emissions and flex-fuel varieties. As part of our replacement program, we are committed to procuring fuel-efficient vehicles that meet our needs without imposing and excessive environmental burden.

Efficient Buildings

To learn more about the green procedures at the MTA Gateway Building, please click here

Solar Powered Facility

The Metrolink Industry Carport Project, completed in April 2012, outfitted the Metrolink Industry Station with approximately 8,300 photovoltaic solar panels covering 940 parking spaces. This is the largest project of this kind in Southern California.

The Industry Station is an example of how resources are conserved both through taking public transit and in generating more sustainable energy.  

Fuel Conservation Program

Metrolink’s Fuel Conversation Program (FCP) allows maintenance crews to shut down the Head End Power (HEP) engines that power the car lights and air conditioners in order to conserve fuel. When train sets are stored overnight and during weekends at layover yards, the locomotive main and HEP engines are shut down and the train set is connected to wayside power. Use of the temporary plug in power while the locomotive engine is shut off reduces exhaust emissions and the amount of fuel that would be consumed by the locomotive engines left idling. SCRRA’s fuel conservation program yields an approximate 13% reduction (853,000 gallons) in fuel consumption per year.

In addition, Metrolink has installed Automatic Engine Start Stop (AESS) mechanism on locomotives to prevent excessive idling, reduce fuel use and reduce emissions. The installation of AESS on our Electro-Motive Diesel (EMD) locomotives was funded in part by South Coast Air Quality Management District’s (AQMD) Carl Moyer Program. The Carl Moyer Program provides competitive grants for the incremental cost of cleaner-than-required engines, vehicles and equipment.  The program focuses on cleaning the air by replacing older heavy-duty diesels with electric, alternative-fuel or cleaner diesel technologies.

To learn more about AQMD’s Carl Moyer Program funding please visit the webpage here.

Pilot Plug-in Program

In April 2012, Metrolink implemented its pilot Plug-in Program, which uses plug-in power at its Central Maintenance Facility in Los Angeles. This technology enables the maintenance personnel to perform portions of the daily servicing and inspections while the HEP engine is off.  This innovation further reduces emissions generated by the locomotive engines. We have successfully implemented the pilot program and continue to look for ways to maximize its use and to expand the program to more locations. Additionally, we are developing an Inland Empire Maintenance Facility, which will eventually service a portion of our fleet. That facility will also utilize plug-ins to minimize engine idling while at the facility.

Back to the top


“Reduce, Reuse, Recycle”

Metrolink aims to incorporate sustainable environmental practices at all levels of our organization. We take the “reduce, reuse, recycle” concept seriously and apply it to Metrolink from top to bottom. Here are just a few steps we have taken to “reduce, reuse and recycle” within Metrolink.

Metrolink truly believes that when it comes to recycling and sustainability, every little bit counts.

Back to the top


Environmental Accountability

Environment, Emissions and Air Quality Regulations

South Coast Air Quality Management District (AQMD) enforces rules 401 and 402 through random, unscheduled visits to our facilities. Metrolink adheres to various regulations enforced by the South Coast Air Quality Management District (AQMD).  Additionally, AQMD inspectors are dispatched to our facilities when a complaint is logged. To date, our facilities have not been in violation of current regulations and are consistently found to be in compliance.

California Air Resources Board (CARB) enforces regulations on mobile sources. Metrolink maintains strict compliance with all CARB guidelines.

Water Regulation

Metrolink is required to commission a third party agency to bi-annually test and visually inspect the quality and management of storm water discharge at the following maintenance facilities:

This process is to verify that Metrolink is in compliance with all water runoff from our facilities, and ensures we maintain clean facilities. Water testing findings are reported to the Regional Water Quality Control Board. Metrolink has kept continued compliance throughout our agency in meeting all required monitoring activities while maintaining a Storm Water Pollution Prevention Plan (SWPPP) and Best Management Practices (BMP) in accordance with the National Pollutant Discharge Elimination System. To learn more about the water testing procedures in Southern California and Metrolink, please visit the State Water Resources Control Board here or call (800) 371-5465 (LINK).

Federal Regulations

Metrolink operations are subject to the Code of Federal Regulations (CFR), which dictate the frequency and nature of mechanical inspections. The following CFR sections describe the federal requirements:

This list represents only a small portion of regulations. To view the most current electronic Code of Federal Regulations, please click here 

Metrolink completed a health risk assessment (HRA) of the agency’s Central Maintenance Facility (CMF) located at 1555 N. San Fernando Road in Los Angeles in 2014. An HRA is an analytical tool used to estimate potential health risks to a particular community from current and/or future exposures to certain air pollutant emissions. Operational improvements at the CMF implemented by Metrolink between the years 2010 and 2017 will reduce area emissions by 79 percent, while health risk to individuals with maximum exposure to CMF operations declines by 83% during the same time period. To review the complete CMF HRA click here.

Back to the top


Future Initiatives

New Silver LEED certified Operations Center

Metrolink is in the process of constructing a new Operations Center that is designed to be Silver LEED certified. The center, which will be conveniently located next to the Metrolink Pomona-North Station, is being built using 75% recycled construction material and will use 16% less energy in operation with features like energy-saving LED lighting. It will also include low-impact storm water treatments such as bioswales and infiltration planters, which are landscape features that will manage water runoff and allow for natural filtration into the ground. The new Operations Center is expected to be completed in late 2014.


Fleet Upgrade

The Metrolink Board of Directors authorized the agency to acquire up to 20 higher powered Tier 4 locomotives at its Dec. 14, 2012 meeting. The locomotives are expected to reduce particulate matter (PM) and nitrogen oxides (NOx) by approximately 86%. Metrolink is on pace to become first in the country to utilize Tier 4 locomotives in revenue service. After significant testing, the locomotives are scheduled to go into service in late 2016. Switching from Tier 0 to Tier 4 locomotives will increase the engine efficiency by reducing fuel usage by approximately 5-8%. New engines will also increase locomotive reliability and efficiency.

The Board’s decision also committed Metrolink to the testing of alternative fuel sources in future operations. Metrolink will make the first five locomotives replaced by the new Tier 4s available to the South Coast Air Quality Management District for the purposes of experimentation with various alternative fuel technologies expected to be commercially available in the next decade.

To learn more about the U.S. Environmental Protection Agency’s locomotive exhaust emission standards, please visit their online reference guide here.

Back to the top


Have a sustainable idea for Metrolink? Email us at

For information regarding our safety measures and policies, please visit our safety page here

For information regarding our innovations, please visit our innovations page here


Information as of Jan. 15, 2014