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Vehicle Technologies Office Fact of the Week

Over half of all carbon monoxide (CO) emissions in 2002 were from highway vehicles; by 2016 that fell to 30%. The share of nitrogen oxides (NOx) emissions from highway vehicles declined from 43% of all NOx emissions in 2002 to 34% in 2016. The highway share of volatile organic compound (VOC) emissions declined by 9% during this same period. Highway vehicles contributed less than 3% of all particulate matter (PM) emissions.

Highway Share of All Pollutant Emissions, 2002-2016

Graphics showing highway share of all pollutant emissions (CO, NOx, PM, and VOC) from 2001 to 2016

Note: Particulate matter emissions include both fine particle matter less than 10 microns (PM-10) and fine particle matter less than 2.5 microns (PM-2.5). Source: U.S. Environmental Protection Agency, National Emissions Inventory and Air Pollutant Emissions Trends Data.Fact #998 Dataset

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Technologies That Will Transform the Transportation System

The transportation system is in the midst of a dramatic worldwide transformation that has the potential to impact our daily lives. Many factors are contributing to this change: overall U.S. demographics are shifting, more people are moving to cities, and connected devices are empowering consumers with more choices and on-demand services. The arrival of new technologies, such as connected and automated vehicles, and the rise of the shared-economy, including car-sharing and ride-hailing, have the potential to provide new, low-cost, mobility options. 

Dramatic Energy Impacts

These new transportation technologies have the potential to provide improvements in safety, affordability, and accessibility to the American people. However, they also present challenges that must be understood. A recent study funded by the U.S. Department of Energy’s Vehicle Technologies Office (VTO) indicates that the future impact of new mobility systems, including connected and automated vehicles, could range from a 60% decrease in overall transportation energy to a 200% increase.

Graphic that depicts the disruption of transportation energy in the future with cars driving toward a
Graphic | Sarah Harman

Energy Efficient Mobility Systems Research

To maximize the advantages of emerging disruptive technologies, such as connected and autonomous vehicles, VTO launched Energy Efficient Mobility Systems (EEMS). This comprehensive research program aims to identify and make full use of energy efficiency opportunities of advanced vehicle technologies and infrastructure, its interactions with existing infrastructure, and improved mobility of people and goods.

Current Mobility Projects

New recently announced “living lab” projects in Washington, Texas and New York are integrating smart mobility technologies in a holistic approach to the movement of people and/or goods that maximize energy efficiency. These projects will test new ideas, collect data, and inform research on energy efficient transportation technologies and systems, creating an essential feedback mechanism to the EEMS research program.

Connected Driving Software Prototype Demo
Watch and learn how connected technologies can improve the safety and fuel efficiency of your car.  

In addition, three EEMS projects will conduct research that evaluates energy savings benefits from connected and automated vehicles. These projects will lead to the creation of new software, controls, and technologies that use connectivity and automation to improve vehicle efficiency and analyze the system-wide energy opportunities available through connectivity and automation combined with shared mobility. 

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Fact of the Week

According to the newly released 2015 American Housing Survey, 63% of all occupied housing units have a garage or carport. Garages and carports often have access to electricity for parked vehicles, so these data are important for electric vehicle market analysis. Seventy-percent of new construction units (five years old or less) have a garage or carport. The West and Midwest regions of the country have a greater percentage of housing with garages or carports, each with over 70%. For rental housing units, only 37% have a garage/carport, as compared to 78% for those owning housing units.

SHARE OF HOUSING UNITS WITH A GARAGE OR CARPORT, 2015

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Note: A housing unit is a house, apartment, group of rooms, or single room occupied or intended for occupancy as separate living quarters.

Fact #958 Dataset

SUPPORTING INFORMATION

Share of Housing Units with Garage or Carport, 2015

 Share of Occupied
Housing Units
Percent with a
Garage or Carport
Tenure
Owner 63% 78%
Renter 37% 37%
Location - Census Region
Northeast 18% 49%
Midwest 22% 72%
South 37% 56%
West 22% 76%
Age of Housing Unit
New construction (< = 5 years) 3% 71%
Older than 5 years 97% 63%
All Occupied Units
Total 118,290 units 63%

Source: U.S. Bureau of the Census, 2015 American Housing Survey, AHS Table Creator, Accessed December 2, 2016.

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