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Idling Facts
Idling is money
out the tailpipe
Think about it - an idling vehicle
actually gets negative MPG
Idling is bad for
air quality and health
Idling emissions can cause cancer and
cause or exacerbate asthma
Idling contributes to
climate change
In California, parked idling annually
emits three million tons of CO2*
Idling wastes energy
In California, parked idling annually
burns 300 million gallons of fuel*
Idle Reduction Technologies for vehicle fleets from NACFE (North American Council for Freight Efficiency)
Idling can be necessary
In weather extremes adequate defrosting and health of occupants
may necessitate idling; visit this site
on desktop computer for details
*SOURCED ESTIMATE ON HOW MUCH IDLING OCCURS IN U.S. & CALIFORNIA
IN THE U.S:
• The U.S. Dept. of Transportation - Office of Highway Policy Information - Motor Fuel Use - 2018: U.S. fuel consumption 180,737,076,000 gallons
• The U.S. Dept. of Energy originally stated in 2012 and maintains today: "Each year, U.S. passenger cars, light-duty trucks, medium-duty trucks, and heavy-duty vehicles consume more than 6 billion gallons of diesel fuel and gasoline—without even moving. Roughly half of that fuel is wasted by passenger vehicles."
IN CALIFORNIA:
•The U.S. Dept. of Transportation - Office of Highway Policy Information - Motor Fuel Use - 2018 - California fuel consumption 18,010,964,000 gallons
• Factor that decreases idling in California since 2012 U.S. DOE statement: as of the 3rd quarter of 2019, 7.9% of all vehicles in California are plug-in hybrid and electric. Additionally, hybrid sales are higher in CA than the rest of the country; this represents an approximately 10% idling decease in CA than nationally
• Factors that increase idling in California (and elsewhere) since 2012 U.S. DOE statement: nearly 5% increase in vehicle fuel use statewide; in-vehicle behaviors such as use of devices like smartphones; door-to-door delivery and ride-hailing services
• Putting this all together (in lieu of no far ranging studies on vehicle idling in California), based on U.S. overall transportation fuel consumption vs U.S. vehicle idling fuel consumption, it is estimated that all vehicles in California consume approximately 600 million gallons of fuel when idling annually. This results in six million tons of CO2 emitted by all idling vehicles in the state. This equates to idling in California being approximately 10% of idling nationally.
Studies show that about one-half of all idling occurs when parked (not in traffic).1, 2. Therefore, it is estimated all vehicles idling when parked in California consume 300 million gallons of fuel, resulting in three million tons of CO2 emissions. MOST OF THIS IDLING IS CONSIDERED UNNECESSARY.
1Vanderbilt University study: Costly myths: An analysis of idling beliefs and behavior in personal motor vehicles (p.4). "...the average American idles for roughly 16 min a day. Over 51%...can be accounted for by individuals idling while in traffic...the remaining 49%...results from idling to warm and while waiting, both of which are avoidable and, in many cases, unnecessary."
2University of Vermont study: Passenger vehicle idling in Vermont (p.25): "Discretionary idling is a large enough percent of all idling in Vermont (approximately half) to suggest policies to pursue behavior change over purely vehicle technologies which eliminate all idling emissions by turning off during travel and at stops."
IN CALIFORNIA
• Spare the Air: Turn the Key – Be Idle
Free! San Francisco Bay Area
• CleanEarth4Kids.org - Oceanside:
• Idle Free Bay Area (Spare the Air)
• Grades of Green - No Idle Zone Los
Angeles South Bay area
• U.S. Dept. of Energy Clean Cities
coalitions: California has 13 Clean
Cities implementing various degrees
of idle reduction initiatives, as well as
Clean Cities in other states. In general,
Clean Cities offers their IdleBox
Toolkit for idling reduction projects.
OUTSIDE CALIFORNIA
• Keep it Clean. Be Idle Free. Washoe
County, NV
• Utah Clean Cities, Being Idle Free is
• Engines Off!, Denver CO
• Kentuckiana Air Education (KAIRE) Idle
Free, Louisville, KY
• IdleFreePhilly, Philadelphia, PA (and
suburbs)
• Idle Free for Our Kids eLearning,
Halifax, Nova Scotia
• U.S. national: It's Your Turn - Turn It Off Sustainable America
• U.S. Dept. of Energy: Idling Reduction
for Personal Vehicles - EXCELLENT
OVERALL GUIDE
• U.S. Dept. of Energy Clean Cities:
IdleBox Toolkit for Idling Reduction
• U.S. EPA Idle Free Schools for a Healthy School Environment