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Capturing the Federal EV Tax Credit for Public Fleets: A Case Study of Multi-Jurisdictional EV Fleet Procurement in Alameda County, California
4/26/2017
Alameda County, California, led a collective purchase of 90 EVs for ten county and municipal public fleets. The aggregate procurement resulted in the purchase of 64 Ford Focus EV sedans and 23 Nissan LEAF EV sedans. The jurisdictions also conducted aggregate procurements for EV charging stations and charging station installations. This publication provides an overview of the procurement process and details how it was successful in attracting bids from local vendors for the purchase of EVs, while reducing vehicle purchase administrative costs for participating fleets.
Authors: Nigro, N.
Work Truck Idling Reduction
3/9/2017
Hybrid utility trucks, with auxiliary power sources for on-board equipment, significantly reduce unnecessary idling resulting in fuel costs savings, less engine wear, and reduction in noise and emissions.
Gas-Saving Tips
2/28/2017
This fact sheet for consumers describes a few simple tips to help obtain the best possible fuel economy from vehicles and to reduce fuel costs.
Clean Cities 2015 Annual Metrics Report
12/28/2016
The U.S. Department of Energy's (DOE's) Clean Cities program advances the nation's economic, environmental, and energy security by supporting local actions to cut petroleum use and greenhouse gas (GHG) emissions in transportation. A national network of nearly 100 Clean Cities coalitions, whose territory covers 80% of the U.S. population, brings together stakeholders in the public and private sectors to deploy alternative and renewable fuels, idle-reduction (IR) measures, fuel economy improvements, and new transportation technologies as they emerge. Each year, DOE asks Clean Cities coordinators to submit annual reports of their activities and accomplishments for the previous calendar year. Progress reports and information are submitted online as a function of the Alternative Fuels Data Center (AFDC) at the National Renewable Energy Laboratory (NREL). Coordinators report a range of information that characterizes the membership, funding, projects, and activities of their coalitions. They also document activities in their region related to the development of refueling/charging infrastructure, sales of alternative fuels; deployment of alternative fuel vehicles (AFVs), plug-in electric vehicles (PEVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs); idle reduction initiatives; fuel economy improvement activities; and programs to reduce vehicle miles traveled (VMT). NREL analyzes the data and translates them into petroleum-use and GHG emission reduction impacts, which are summarized in this report.
Authors: Johnson, C.; Singer, M.
Field Evaluation of Medium-Duty Plug-in Electric Delivery Trucks
12/16/2016
This report focuses on medium-duty electric delivery vehicles operated by Frito-Lay North America (FLNA) at its Federal Way, Washington, distribution center. The 100% electric drive system is an alternative to conventional diesel delivery trucks and reduces both energy consumption and carbon dioxide (CO2) emissions. The vehicles' drive cycles and operation are analyzed and compared to demonstrate the importance of matching specific electric vehicle (EV) technologies to the appropriate operational duty cycle. The results of this analysis show that the Smith Newton EVs demonstrated a 68% reduction in energy consumption over the data reporting period compared to the conventional diesel vehicles, as well as a 46.4% reduction in CO2 equivalent emissions based on the local energy generation source. In addition to characterizing the in-use performance of the EVs compared to the conventional diesels, detailed facility load data were collected at the main building power feed as well as from each of the 10 EV chargers to better understand the broader implications associated with commercial EV deployment. These facility loads were incorporated into several modeling scenarios to demonstrate the potential benefits of integrating onsite renewables.
Authors: Prohaska, R.; Simpson, M.; Ragatz, A.; Kelly, K.; Smith, K.; Walkowicz, K.
Low-Carbon Natural Gas for Transportation: Well-to-Wheels Emissions and Potential Market Assessment in California
12/1/2016
This report improves on the understanding of the long-term technology potential of low-carbon natural gas (LCNG) supply pathways by exploring transportation market adoption potential through 2035 in California. Techno-economic assessments of each pathway are developed to compare the capacity, cost, and greenhouse gas (GHG) emissions of select LCNG production pathways. The study analyzes the use of fuel from these pathways in light-, medium-, and heavy-duty vehicle applications. Economic and life-cycle GHG emissions analysis suggest that landfill gas resources are an attractive and relatively abundant resource in terms of cost and GHG reduction potential, followed by waste water treatment plants and biomass with gasification and methanation. Total LCNG production potential is on the order of total natural gas demand anticipated in a success scenario for future natural gas vehicle adoption by 2035 across light-, medium-, and heavy-duty vehicle markets (110 trillion Btu/year).
Authors: Penev, M.; Melaina, M.; Bush, B.; Muratori, M.; Warner, E.; Chen, Y.
Estimated Bounds and Important Factors for Fuel Use and Consumer Costs of Connected and Automated Vehicles
11/1/2016
This report details a study of the potential effects of connected and automated vehicle (CAV) technologies on vehicle miles traveled (VMT), vehicle fuel efficiency, and consumer costs. Related analyses focused on a range of light-duty CAV technologies in conventional powertrain vehicles -- from partial automation to full automation, with and without ridesharing -- compared to today's base-case scenario. Analysis results revealed widely disparate upper- and lower-bound estimates for fuel use and VMT, ranging from a tripling of fuel use to decreasing light-duty fuel use to below 40% of today's level. This wide range reflects uncertainties in the ways that CAV technologies can influence vehicle efficiency and use through changes in vehicle designs, driving habits, and travel behavior. The report further identifies the most significant potential impacting factors, the largest areas of uncertainty, and where further research is particularly needed.
Authors: Stephens, T.S.; Gonder, J.; Chen, Y.; Lin, Z.; Liu, C.; Gohlke, D.
American Recovery and Reinvestment Act: Clean Cities Project Awards
10/3/2016
Each Clean Cities project award under the American Recovery and Reinvestment Act included a diverse group of stakeholders who worked together to lay the foundation for their communities to adopt alternative fuels and petroleum reduction strategies. This document provides a snapshot of the impact of each project and highlights the partners and Clean Cities coalitions who helped transform local and regional transportation markets through 25 projects impacting 45 states.
Authors: Kelly, K.
Fleets Run Cleaner on Natural Gas; Emissions and Environmental Benefits of Natural Gas Vehicle
9/16/2016
Lower greenhouse gas and environmental related emissions are priorities for shippers, trucking fleets, municipal refuse vehicles and transit buses across the country. Natural gas provides clear advantages among alternative transportation fuels. This fact sheet explains the emission and environmental benefits associated with CNG and LNG, as well as the technical reasons behind the calculations and inputs that were chosen.
The Growing Presence of Propane in Pupil Transportation
8/2/2016
School districts all over the United States are turning to propane autogas to fuel their buses. In 2014, an estimated 7,000 propane autogas buses drove a half a million students to school in 45 states. This white paper highlights the added safety from the quieter propane engine, the environmental benefits from propane, and the reduced total cost of ownership of owning a propane bus.
Case Study: Natural Gas Regional Transport Trucks
8/1/2016
Learn about Ryder System, Inc.'s experience in deploying nearly 200 CNG and LNG heavy-duty trucks and construction and operation of L/CNG stations using ARRA funds. Using natural gas in its fleet, Ryder mitigated the effects of volatile fuel pricing and reduced lifecycle GHGs by 20% and petroleum by 99%.
Authors: Laughlin, M.; Burnham, A.
Emissions Associated with Electric Vehicle Charging: Impact of Electricity Generation Mix, Charging Infrastructure Availability, and Vehicle Type
4/11/2016
With the aim of reducing greenhouse gas emissions associated with the transportation sector, policy-makers are supporting a multitude of measures to increase electric vehicle adoption. The actual level of emission reduction associated with the electrification of the transport sector is dependent on the contexts that determine when and where drivers charge electric vehicles. This analysis contributes to our understanding of the degree to which a particular electricity grid profile, vehicle type, and charging patterns impact CO2 emissions from light-duty, plug-in electric vehicles. We present an analysis of emissions resulting from both battery electric and plug-in hybrid electric vehicles for four charging scenarios and five electricity grid profiles. A scenario that allows drivers to charge electric vehicles at the workplace yields the lowest level of emissions for the majority of electricity grid profiles. However, vehicle emissions are shown to be highly dependent on the percentage of fossil fuels in the grid mix, with different vehicle types and charging scenarios resulting in fewer emissions when the carbon intensity of the grid is above a defined level. Restricting charging to off-peak hours results in higher total emissions for all vehicle types, as compared to other charging scenarios.
Authors: McLaren, J.; Miller, J.; O'Shaughnessy, E.; Wood, E.; Shapiro, E.
