The potential for low-carbon renewable methane as a transport fuel in France, Italy, and Spain

Breathing Easy: A Survey of Zero Emission Buses Across America

Transit Vehicle Emissions Program

Biogas as a vehicle fuel in commuter buses – Life cycle cost and green house gas study

In-Use Performance Comparison of Hybrid Electric, CNG, and Diesel Buses at New York City Transit

Analysis of Electric Drive Technologies for Transit Applications: Battery-Electric, Hybrid-Electric, and Fuel Cells