As a founding member of the American Public Transportation Association’s (APTA) Sustainability Commitment, Metro annually reports on a framework of performance metrics that enable all APTA members to measure and report progress related to sustainability over time. This rigorous reporting also allows Metro to remain transparent with its customers and business partners across LA County, demonstrating alignment and statewide policy and targets on climate and environment. The reporting framework and methodology that govern these metrics conform to APTA’s Recommended Practice "Quantifying and Reporting Transit Sustainability Metrics."
APTA recommends that transit agencies use normalization factors when reporting performance metrics in order to account for changes in service size and scale. These factors are applied when calculating annual performance to more effectively measure and compare sustainability performance over time, especially during years of service growth or change. Metro applies Vehicle Revenue Miles (VRM) as the normalization factor for all metrics in this table, unless otherwise noted. VRM represents the total number of miles Metro vehicles traveled during revenue service (i.e., the time when a vehicle is available to the public and is expected to carry passengers).
In 2020, VRM declined by nearly 22% due to service reductions resulting from the COVID-19 pandemic. Consequently, while there were improvements in performance (e.g., reduced emissions, energy use, water, etc.) across nearly every performance area in 2020, the normalized figures in this table may not reflect that improvement due to the substantive decrease in VRM.
How to Navigate This Section
- Annual APTA Sustainability Metrics are consolidated into a summary that can be accessed through the navigation menu at the top of the page.
- The APTA Metrics Performance Summary contains a year-to-year comparison for each performance metric.
- The APTA performance metrics are normalized by our annual Vehicle Revenue Miles (VRM) in order to provide a more accurate year-over-year comparison, accounting for changes in service size and scale.
APTA Sustainability Indicators
2019-2020 Performance Trends
1United States Dollars (USD) in this table are presented as 2020 USD.
2Criteria air pollutant (CAP) emissions are a normalized aggregate of hydrocarbon (HC), nitrogen oxide (NOx) and particulate matter (PM) emissions. In 2020, criteria air pollutant emissions from Metro non-revenue and vanpool vehicles were included for the first time. Consequently, the calculation methodology was adjusted in two ways. First, CAP emissions are now normalized to all vehicle revenue miles, when previously they were only normalized to vehicle revenue miles from Metro bus fleets. Second, the aggregated pounds total of emissions includes HC from the bus fleets, NOx from all fleets and an aggregated PM total including general PM emissions from bus fleets and PM10 emissions from non-revenue and vanpool vehicles. PM10 consists of small particulate matter with an aerodynamic diameter that is less than or equal to 10 micrometers. Consequently, the 2019 and 2020 figures are updated to reflect the new methodology.
3In 2020, Metro updated its GHG emissions calculation methodology to calculate Scope 2 emissions using both market-based and location-based emission factors. The former reflects the emissions intensity of purchased electricity from utilities based on the sources from which they procure energy and the latter reflects the average emissions intensity of the regional grid on which our energy consumption occurs. In this table, emissions totals are based on market-based emissions factors.
4In 2020, Metro updated its APTA energy use metric calculation methodology to aggregate all energy use in 1,000 British Thermal Units (kBtu), whereas previously it had been aggregated in Megajoules (MJ). The 2019 and 2020 figures in this table reflect corrected normalized figures in kBtu per vehicle revenue mile.
5Waste metrics in this table only reflect solid waste generated and diverted from operations, not from construction.