Publications

Clean Cities and Communities Alternative Fuel Price Report, April 2026

7/15/2026

The Clean Cities and Communities Alternative Fuel Price Report for April 2026 is a quarterly report on the prices of alternative fuels in the U.S. and their relation to gasoline and diesel prices. This issue describes prices that were gathered from Clean Cities and Communities coalition directors and stakeholders between April 1, 2026 and April 30, 2026, and then averaged in order to determine regional price trends by fuel and variability in fuel price within regions and among regions. The prices collected for this report represent retail, at-the-pump sales prices for each fuel, including Federal and state motor fuel taxes.

Table 2 reports that the nationwide average price (all amounts are per gallon) for regular gasoline has increased $1.20 from $2.89 to $4.09; diesel increased $1.98 from $3.57 to $5.55; CNG increased 4 cents from $3.04 to $3.08; ethanol (E85) increased 95 cents from $2.36 to $3.31; propane increased 33 cents from $3.26 to $3.59; and biodiesel (B20) increased $2.03 from $3.27 to $5.30.

According to Table 3, CNG is $1.01 less than gasoline on an energy-equivalent basis and E85 is 21 cents more than gasoline on an energy-equivalent basis.

Authors: Carias, L

Electric Vehicle Batteries and Recycling

6/15/2026

Increasing use of lithium-ion batteries for electric and hybrid vehicles creates new challenges and opportunities. Battery electric vehicles, plug-in hybrid electric vehicles, and hybrid electric vehicles depend primarily on rechargeable high-energy lithium-ion (Li-ion) batteries. Li-ion batteries for vehicles are very reliable with long lifespans; most carry warranties of 8–10 years or 100,000 miles.

Hydrogen applications in airport operations: A review using the Port Authority of New York and New Jersey as an illustrative airport system

6/4/2026

The paper reviews hydrogen-relevant pathways across airport operations, including sustainable aviation fuel production, hydrogen-powered aircraft, ground support equipment, and stationary power systems. It also uses the PANYNJ airport system as an illustrative operating context to discuss emissions, infrastructure, safety, and deployment considerations.

Authors: Semchukova, V., Topolski, K., and Abdin, Z.

Clean Cities and Communities Partnership 2024 Activity Report

6/2/2026

Clean Cities and Communities (CC&C) is a U.S. Department of Energy (DOE) partnership that fosters collaboration and innovation to advance transportation energy choices nationwide. More than 75 DOE-designated CC&C coalitions work in urban, suburban, and rural areas to deliver objective technical expertise based on a unique understanding of local markets. As partners with DOE’s Transportation Technologies Office, coalitions build bridges between national priorities and local needs to create transportation energy systems that are affordable, reliable, and secure. Together, coalitions create compounding impacts nationwide that support locally driven energy choices and benefit regional economic development and job growth. This report summarizes the success and impact of partnership activities based on data and information provided in their annual reports.

Authors: Singer, M.; Johnson, C.; Wilson, A.; Reichelt, L.; Abdullah, M.

Concise Guide on Hydrogen for Ports

5/1/2026

Ports have benefited from relatively stable energy systems for the better part of a century, with fossil fuels powering most mobile port equipment, vessels, trains, and trucks, and grid electricity energizing facilities and stationary equipment. In the past decade, however—because of technological innovation and changing emissions regulations and customer needs—ports are considering significant changes to the way they power their operations. This report aims to provide port executives, terminal and fleet operators, and port communities with a clear understanding of the state of hydrogen technologies, an overview of its benefits and challenges, and a pathway forward for ports that choose to consider implementation of hydrogen technology at their facility.

Clean Cities and Communities Overview

4/23/2026

Clean Cities and Communities is a U.S. Department of Energy (DOE) partnership that fosters collaboration and innovation to advance transportation energy choices nationwide. More than 75 DOE-designated Clean Cities and Communities coalitions work in urban, suburban, and rural areas to deliver objective technical expertise based on a unique understanding of local markets. As partners with DOE's Transportation Technologies Office, coalitions build bridges between national priorities and local needs to create transportation energy systems that are affordable, reliable, and secure.

Clean Cities and Communities Alternative Fuel Price Report, January 2026

4/15/2026

The Clean Cities and Communities Alternative Fuel Price Report for January 2026 is a quarterly report on the prices of alternative fuels in the U.S. and their relation to gasoline and diesel prices. This issue describes prices that were gathered from Clean Cities and Communities coalition directors and stakeholders between January 1, 2026 and January 30, 2026, and then averaged in order to determine regional price trends by fuel and variability in fuel price within regions and among regions. The prices collected for this report represent retail, at-the-pump sales prices for each fuel, including Federal and state motor fuel taxes.

Table 2 reports that the nationwide average price (all amounts are per gallon) for regular gasoline has decreased 25 cents from $3.14 to $2.89; diesel decreased 17 cents from $3.74 to $3.57; CNG increased 58 cents from $2.96 to $3.4; ethanol (E85) decreased 27 cents from $2.63 to $2.36; propane decreased 18 cents from $3.42 to $3.26; and biodiesel (B20) decreased 47 cents from $3.74 to $3.27.

According to Table 3, CNG is 15 cents more than gasoline on an energy-equivalent basis and E85 is 18 cents more than gasoline on an energy-equivalent basis.

Authors: Carias, L

Thermal Damage Potential of Electric Vehicles

4/1/2026

This report assesses the risk that electric vehicle (EV) battery fires pose regarding thermal damage to other vehicles involved in a crash and to compare EV and internal combustion engine vehicle (ICEV) fires.

Authors: Luketa, A.

Strategic Pathways for Indigenous Resilient and Innovative Transportation

4/1/2026

This project, Strategic Pathways for Indigenous Resilient and Innovative Transportation, serves as a guidebook for Tribes interested in pursuing public EV charging infrastructure. The guidebook is designed to serve Tribal planners, Tribal departments of transportation, environmental offices, Tribal enterprises, Tribal utility authorities, Tribal leadership, and any other interested parties.

Fuel Cell Electric Bus Status Report 2025

3/17/2026

This report highlights recent changes in the FCEB market, status updates for deployments, and a detailed performance evaluation of a large fleet of FCEBs operated by Foothill Transit in California during the period from June 2023 to December 2024.

Authors: Jeffers, M., He, Y., and Lammert, M.

Techno-Economic, Feasibility, and Life Cycle Analysis of Renewable Propane: 2025 Update

3/1/2026

This report clarifies the current and future landscape for renewable propane (RP) production, this work evaluates the value proposition of recovering RP from existing and planned hydroprocessed esters and fatty acids (HEFA) biorefineries and surveys emerging technologies under development or deployment. HEFA biorefineries co-produce a propane-rich fuel gas stream, normally used to meet HEFA process heat requirements, from which propane can be recovered and sold to create an additional revenue stream alongside liquid transportation fuels such as renewable diesel (RD) and sustainable aviation fuel (SAF).

Energy 101 Transportation

3/1/2026

The Energy 101: Transportation presentation, developed for the Energy Technology Innovation Partnership Project (ETIPP), provides an overview of transportation. It covers fundamental concepts, technologies, considerations, case studies, and additional resources.

Facility Modification Guidelines for Maintenance and Repair of Natural Gas Vehicles

3/1/2026

This document provides an overview of the modifications necessary for existing maintenance facilities that service conventional liquid- or petroleum-fueled vehicles to service vehicles powered by CNG, LCNG, and LNG only, and it can be used as a guide for new facility requirements as well.

Authors: The Transport Project Technology & Development Committee

Idle Reduction for Personal Vehicles

3/1/2026

Fact sheet on reducing engine idling in personal vehicles. Idling your vehicle-running your engine when you're not driving it - truly gets you nowhere. Idling reduces your vehicle's fuel economy, costs you money, and creates pollution. Idling for more then 10 seconds uses more fuel and produces more pollutants that contributes to smog than stopping and restarting your engine does.

What is Data Analysis?

2/6/2026

A quick guide to understand data and use it to tell compelling stories. Data analysis helps develop insights for research projects, planning interventions, or systematic information gathering. This guide highlights important aspects of the data analysis process.