Navigation Links
Civil engineers find savings where the rubber meets the road
Date:5/22/2012

CAMBRIDGE, Mass. -- A new study by civil engineers at MIT shows that using stiffer pavements on the nation's roads could reduce vehicle fuel consumption by as much as 3 percent a savings that could add up to 273 million barrels of crude oil per year, or $15.6 billion at today's oil prices. This would result in an accompanying annual decrease in CO2 emissions of 46.5 million metric tons.

The study, released in a recent peer-reviewed report, is the first to use mathematical modeling rather than roadway experiments to look at the effect of pavement deflection on vehicle fuel consumption across the entire U.S. road network. A paper on this work has also been accepted for publication later this year in the Transportation Research Record.

By modeling the physical forces at work when a rubber tire rolls over pavement, the study's authors, Professor Franz-Josef Ulm and PhD student Mehdi Akbarian, conclude that because of the way energy is dissipated, the maximum deflection of the load is behind the path of travel. This has the effect of making the tires on the vehicle drive continuously up a slight slope, which increases fuel use.

The deflection under the tires is similar to that of beach sand underfoot: With each step, the foot tamps down the sand from heel to toe, requiring the pedestrian to expend more energy than when walking on a hard surface. On the roadways, even a 1 percent increase in aggregate fuel consumption leaves a substantial environmental footprint. Stiffer pavements which can be achieved by improving the material properties or increasing the thickness of the asphalt layers, switching to a concrete layer or asphalt-concrete composite structures, or changing the thickness or composition of the sublayers of the road would decrease deflection and reduce that footprint.

"This work is literally where the rubber meets the road," says Ulm, the George Macomber Professor in the Department of Civil and Environmental Enginee
'/>"/>

Contact: Denise Brehm
brehm@mit.edu
617-253-8069
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Ancient civilizations reveal ways to manage fisheries for sustainability
2. Heightened Security Threats and Economic Issues Provide Fillip to Global Civil and Military Biometrics Market, Says Frost & Sullivan
3. DigitalPersona Co-Founder and CTO to Tackle Critical Issue of Civil ID Security at Biometrics 2011
4. DigitalPersona Showcases Fingerprint Biometrics for Civil ID Applications at the Biometric Consortium Conference
5. Civil engineers to honor NJITs Priscilla Nelson for research
6. Lost civilization under Persian Gulf?
7. U.S. Supreme Court Allows Coercive Confinement to Continue in Attorneys Civil Contempt Case
8. Frost & Sullivan Looks at Biometrics Advancement in Civil Security: Exploring Opportunities for Today and Beyond
9. Civil engineers name NJITs John Schuring Educator of Year
10. Civil engineers name NJITs John Schuring Educator of Year Award
11. Engineers use droplet microfluidics to create glucose-sensing microbeads
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... Dec. 16, 2014 Valencell, a leader in performance ... technology to industry leaders such as Intel, Jabra, Atlas, ... biometric wearable products. These products will be showcased at ... Las Vegas . "Our partners ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition of the ... to their offering. One major trend ... continuous advances in technology, it is important to upgrade ...
(Date:12/10/2014)... YORK , Dec. 8, 2014 You,ve been here before: ... can,t remember your password, site key or the answer to your ... teacher? Today, Hoyos Labs , a digital ... put an end to the frustration that comes with usernames, passwords ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3
... existed in the Amazon before the arrival of Europeans, ... the result of research led by Crystal McMichael and ... The finding overturns the idea the Amazon was a ... that transformed vast tracts of the landscape. The ...
... vegetarian and ecological products, but is it really making ... about ethical trade, Gothenburg researchers Bengt Brlde and ... help ease people,s bad conscience, it does nothing to ... fixing the problem will require collective solutions, such as ...
... UC Santa Barbara scientists turned to the simple sponge to ... and found that, but for a mechanism that coordinates the ... synapses, sponges and the rest of the animal world may ... of a protosynaptic gene expression network," are published in the ...
Cached Biology News:Scientists reconstruct pre-Columbian human effects on the Amazon Basin 2Ethical trade: 'Good intentions go to waste' 2Clues to nervous system evolution found in nerve-less sponge 2
(Date:1/22/2015)... MA (PRWEB) January 22, 2015 zFlo ... is pleased to announce an exciting product from a new ... motion analysis solutions over the past 15 years, with offerings ... Most recently, their 3D IMU system (inertial measurement unit), iSen, ...
(Date:1/22/2015)... 2015 Selexis SA, a serial innovation ... Banks (RCBs) used for drug discovery to commercial manufacturing, ... include Next-Generation Sequencing (NGS) data packages. The ... manufacturing by ensuring the integrity of the gene, validation ...
(Date:1/22/2015)... Jan. 22, 2015   Cypher Genomics, Inc., ... (NASDAQ: SQNM ), the leading molecular ... next generation noninvasive prenatal tests (NIPT). Through this ... called Mantis™, to advance analysis of clinically-relevant fetal ...
(Date:1/22/2015)...  Derma Sciences, Inc. (Nasdaq: DSCI ), ... care, announces that AMNIOEXCEL® and AMNIOMATRIX®, amniotic allografts ... the Premier, Inc. Regenerative Skin Grafting contract portfolio. ... and AMNIOMATRIX® product lines, which continue to be ...
Breaking Biology Technology:3D Motion Capture Just Got Easy 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 2Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 3Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 4Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 5
... LIVERPOOL, February 2 Gray Healthcare has ... to lead its,expanding Community Recovery Team, as Clinical Director. ... years, experience of senior management in mental,health in both the ... of operations at Cambian Healthcare, covering 12 psychiatric,rehabilitation hospitals, he ...
... SAN DIEGO , Feb. 1 BioMed Realty Trust, Inc. ... its fourth quarter and year ended December 31, 2009 after ... Alan D. Gold , Chairman and Chief Executive Officer, and ... conference call at 10:00 a.m. Pacific Time on Thursday, ...
... Astrogenetix ... Space Station (ISS) to 2020 or beyond. , ... (Vocus) February 1, 2010 -- Astrogenetix is issuing the following statement applauding ... beyond. , ,Thomas B. Pickens III, Chairman of Astrogenetix, Inc.:, , ,“We are excited to ...
Cached Biology Technology:Noel Tracey to Head Up Gray Healthcare Recovery Team 2BioMed Realty Trust to Report 2009 Fourth Quarter and Year-End Results 2Astrogenetix Statement On Nasa's Fiscal Year 2011 Budget Announcement 2
... Polyclonal Phosphorylated Anti-GluR1 Glutamate is the ... many years it had been considered to ... NMDA, AMPA and kainate receptors that are ... Recently, glutamate has been shown to regulate ...
Anti-ADP-Ribosylation Factor 1, clone 3F1 Immunogen: Synthetic peptide corresponding to the C-terminal amino acid sequence of human ARF1. Available Date: 38495...
TNF-Related Apoptosis Inducing Ligand-Receptor-1...
Pim-1 (12H8)...
Biology Products: