U.S. GAO - Energy Efficiency: Potential Fuel Savings Generate...
Popularity Report
 |
|||
|
|||
|
|||
|
|||
|
|||
|
Rank
Bookmark History
Public Sticky notes
In response to the request, we reviewed existing literature and consulted knowledgeable stakeholders on the following: (1) What is the relationship between speed and the fuel economy of vehicles? (2) How might reducing the speed limit affect fuel use?
Highlighted by bmevans
there is no single speed that optimizes fuel economy for all vehicles
Highlighted by bmevans
peed that optimizes fuel economy for all vehicles. Optimal speed for fuel economy for individual vehicles ranges widely, but is generally between 30 and 60 mph, depending on a vehicle's characteristics. However, a vehicle's fuel economy also depends on other factors besides air resistance. Factors that enhance
Highlighted by bmevans
engine efficiency enhancement
Highlighted by bmevans
electronic and computer controls,
Highlighted by bmevans
transmissions, and hybrid technology
Highlighted by bmevans
offset by increases in vehicle weight, performance, and accessory loads.
Highlighted by bmevans
Lowering speed limits can potentially reduce total fuel consumption
Highlighted by bmevans
consistent with estimates of the impact of the past national speed
Highlighted by bmevans
175,000 to 275,000 barrels of oil per day
Highlighted by bmevans
rivers' compliance with a reduced speed limit
Highlighted by bmevans
Moreover, a national speed limit would not affect many of the miles driven in the United States, such as those in urban areas, where most vehicles are already traveling at lower speeds due to lower speed limits or congestion
Highlighted by bmevans
weather conditions
Highlighted by bmevans
road conditions
Highlighted by bmevans
Public Comment