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

ring. "We've got to find ways to improve the environmental footprint of our roadway infrastructure, but previous empirical studies to determine fuel savings all looked at the impact of roughness and pavement type for a few non-conclusive scenarios, and the findings sometimes differed by an order of magnitude. Where do you find identical roadways on the same soils under the same conditions? You can't. You get side effects. The empirical approach doesn't work. So we used statistical analysis to avoid those side effects."

The new study defines the key parameters involved in analyzing the structural (thickness) and material (stiffness and type of subgrade) properties of pavements. The mathematical model is therefore based on the actual mechanical behavior of pavements under load. To obtain their results, Ulm and Akbarian fed their model data on 5,643 representative sections of the nation's roadways taken from Federal Highway Administration data sets. These data include information on the surface and subsurface materials of pavements and the soils beneath, as well as the number, type and weight of vehicles using the roads. The researchers also calculated and incorporated the contact area of vehicle tires with the pavement.

Ulm and Akbarian estimate that the combined effects of road roughness and deflection are responsible for an annual average extra fuel consumption of 7,000 to 9,000 gallons per lane-mile on high-volume roads (not including the most heavily traveled roads) in the 8.5 million lane-miles making up the U.S. roadway network. They say that up to 80 percent of that extra fuel consumption, in excess of the vehicles' normal fuel use, could be reduced through improvements in the basic properties of the asphalt, concrete and other materials used to build the roads.

"We're wasting fuel unnecessarily because pavement design has been based solely on minimizing initial costs more than performance how well the pavement holds up when it sh
'/>"/>

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:7/11/2014)... addition to the hippocampus, the marginal division of ... memory. What is the impact degree of substance ... and memory function? Yan Yu and his team, ... found, using immunofluorescence staining, that substance P receptor, ... and striatal marginal division of normal rats. Unilateral ...
(Date:7/11/2014)... -- Research and Markets has announced the ... Industry Analysis Size Share Growth Trends and Forecast to ... http://photos.prnewswire.com/prnh/20130307/600769 The rising number ... for high level security in both private and public ... username and passwords, tokens etc. are vulnerable to attacks. ...
(Date:7/10/2014)... Albuquerque, and other major cities in New Mexico, nearly ... municipal wastewater rather than precious potable water supplies. Across ... of all golf courses receive treated effluent. Reusing the ... Additionally, golf courses and homeowners alike fertilize their lawns ... is nitrate. A New Mexico State University turfgrass expert ...
Breaking Biology News(10 mins):International Biometrics Technology Market - Industry Analysis Size Share Growth Trends and Forecast to 2019 2'Tailored' water -- the latest in lawn care 2
... is available in French . Montreal -- ... consumers, thanks to Concordia University researchers who,ve developed a new ... products. "Even though Canada does not allow the use ... there were no methods or equipment to effectively measure residual ...
... With concerns about jobs in the headlines around the world, ... ( C&EN ) presents a 3-part cover story on the ... than 96% of all manufactured goods, with the chemical industry ... C&EN is the weekly newsmagazine of the American Chemical ...
... and BGI, the world,s largest genomics institute, today ... conduct large-scale human genome sequencing and bioinformatics analysis ... at Children,s Hospital. The partnership will focus on ... pediatric diseases using next-generation sequencing. The Center became ...
Cached Biology News:Children's Hospital of Philadelphia and BGI announce partnership and new Joint Genome Center 2
(Date:7/10/2014)... 2014 Robert Harman, DVM, Founder and CEO ... proud to announce the relaunch of his highly informative blog, ... series called “ What are Stem Cells ?” Dr. ... straightforward foundation in the basics of stem cell therapy so ... right type of treatment when considering regenerative medicine. , A ...
(Date:7/10/2014)... , July 10, 2014 ... Dmitry Medvedev , presented Russia,s ... BIOCAD . The Company is developing a unique ... MabNext project BIOCAD develops a number of innovative drugs ... autoimmune diseases. The ceremony took place at the International ...
(Date:7/10/2014)... D.C., April 15, 2014 -- According to the ... to nuclear security comes from terrorists acquiring sufficient ... to construct a crude nuclear explosive device. The ... nuclear trafficking have involved gram-level quantities, which can ... , According to a new study appearing this ...
(Date:7/10/2014)... the fractional quantum Hall effect in bilayer graphene and ... tuned by an electric field. , The fractional ... to thin sheets are exposed to large magnetic fields, ... of individual electrons behave as a single system. However, ... established, many details of this collective behavior remain not ...
Breaking Biology Technology:Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2Sensitive detection method may help impede illicit nuclear trafficking 2Columbia researchers observe tunable quantum behavior in bilayer graphene 2Columbia researchers observe tunable quantum behavior in bilayer graphene 3
... SuperGen Inc.,(Nasdaq: SUPG ), a pharmaceutical company ... therapies for solid tumors and,hematological malignancies, today announced ... Officer is scheduled to present at the Thomas,Weisel ... the Four,Seasons Hotel in Boston. SuperGen,s presentation ...
... Aug. 29 Caliper Life,Sciences, Inc. (Nasdaq: ... the,Thomas Weisel Partners Healthcare Conference 2007 will be ... Kevin Hrusovsky, President and CEO,of Caliper, will be ... http://www.veracast.com/webcasts/twp/healthcare07/98209449.cfm . An archived,presentation will be available for ...
... Aug. 28 /Xinhua-PRNewswire-FirstCall/ -- Pharmaxis,(ASX: PXS, Nasdaq: PXSL) ... of,Bronchitol for the treatment of people with bronchiectasis ... life and mucus clearance. Data from the ... quality of life after 12 weeks of treatment ...
Cached Biology Technology:Phase III Trial Finds Pharmaxis' Bronchitol Effective 2Phase III Trial Finds Pharmaxis' Bronchitol Effective 3
Yersinia pestis...
... WinList come straight from the folks who ... automatic region positioning, N-Stat regions, and presentation-quality ... thoughtful conversations, and careful design. Of course, ... are still there, too. WinList leads the ...
Insect Cell Lysis Buffer 50 ml...
Recognizes the VZV nucleocapsid by indirect immunofluorescence and immunoprecipitation. Shows cross-reactivity to HSV....
Biology Products: