EPA Science Inventory

Life Cycle Assessment of Diesel and Electric Public Transportation Buses

Citation:

Cooney, G., T. R. HAWKINS, AND J. Marriott. Life Cycle Assessment of Diesel and Electric Public Transportation Buses. JOURNAL OF INDUSTRIAL ECOLOGY. Wiley-Blackwell Publishing, Hoboken, NJ, 17(5):689-699, (2013).

Description:

The Clean Air Act identifies diesel powered motor vehicles, including transit buses, as significant sources of several criteria pollutants which contribute to ground level ozone formation or smog. The effects of air pollution in urban areas are often more significant due to congestion and can lead to respiratory and cardiovascular health impacts. Life cycle assessment has been utilized in the literature to compare conventional gasoline powered passenger cars with various types of electric and hybrid powered alternatives; however, no similarly detailed studies exist for mass transit buses. LCA results from this study indicate the use phase, consisting of diesel production/combustion for the conventional bus and electricity generation for the electric bus, dominates most impact categories; however, the effects of battery production are significant for global warming, carcinogenics, ozone depletion, and ecotoxicity. There is a clear connection between the mix of power generation technologies and the preference for the diesel or electric bus. With the existing U.S. average grid, there is a strong preference for the conventional diesel bus over the electric bus when considering global warming impacts alone. Policy makers must consider regional variations in the electricity grid prior to recommending the use of battery electric buses to reduce CO2 emissions. This study found the electric bus was preferable in only eight states including Washington and Oregon. Improvements in battery technology reduce the life cycle impacts from the electric bus, but the electricity grid makeup is the dominant variable.

Purpose/Objective:

To inform the public

URLs/Downloads:

http://dx.doi.org/10.1111/jiec.12024   Exit

Website   Exit

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Projected Completion Date: 10/01/2013
Record Last Revised: 03/26/2014
Record Created: 11/23/2011
Record Released: 11/23/2011
OMB Category: Other
Record ID: 239649

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUSTAINABLE TECHNOLOGY DIVISION

SUSTAINABLE ENVIRONMENTS BRANCH