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| General |
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| 1/26/2010 - International Contest on LTPP Data Analysis |
| 3/19/2007 - ESAL Calculator |
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| LTPP DataPave Online |
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| 6/12/2006 - ERD File Builder |
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| 1/26/2010 - International Contest on LTPP Data Analysis |
The Federal Highway Administrations (FHWA) Long Term Pavement Performance Program (LTPP) and the Transportation and Development Institute, American Society of Civil Engineers (ASCE) are co-sponsoring the International Contest on LTPP Data analysis. The contest is designed to encourage university students, professors, and highway department engineers from around the world to get involved in using the LTPP database.
The contest deadline is June 30, 2010. We would like for you to encourage all your colleagues and friends to participate. Please send all papers to Andrea Baker, (ASCE), abaker@asce.org. Please download the following Adobe Acrobat PDF files for detailed information on the contest:
Contest Participants Manual 2010
2010 Annual International Contest on LTPP Data Analysis (English)
2010 Annual International Contest on LTPP Data Analysis (Spanish)
If you have questions or need additional information, please contact FHWA:
Antonio Nieves Torres
Federal Highway Administration
1200 New Jersey Avenue, SE. E73-446
Washington, DC 20590
E-mail: antonio.nieves@dot.gov
Phone: 202-366-4597
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| 3/19/2007 - ESAL Calculator |
ESAL Calculator was developed by MACTEC Engineering and Consulting, Inc. It was previously released as utility software that was included as a part of the LTPP SDR package, Equivalent Single-Axle Load (ESAL) estimates, commonly used to determine pavement loading. State highway agencies provide these estimates to LTPP using various estimation methods for the years where no traffic loading data is available. ESAL estimates in the LTPP database are considered as computed parameters since they are not measured values. The ESAL Calculator utility was developed for calculating the ESAL estimates to assist LTPP database users.
What does it do?
ESAL Calculator computes the annual estimate of traffic applied to the LTPP lane when monitored weight data are available. The utility uses the 1993 AASHTO Pavement Design Guide method and data from LTPP’s current SDR release to create the estimates. The inputs needed to calculate the estimates include layer thickness, material type, climatic region, and monitored traffic weight data. If there are no monitored weight data for a year, the estimate is not computed for that year. After the estimate is computed, tables for annual estimates and intermediate values are produced.
The annual estimates table lists the site, year, and KESAL estimate for that year. One of the intermediate tables indicates the source of the data and the input values for items other than traffic and section properties. Intermediate tables for the asphalt concrete and portland cement concrete structural information also are produced. In cases where all layer data are not available, particularly for overlays, typical values for the experiment are substituted |
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| 6/12/2006 - ERD File Builder |
The LTPP program has enhanced the DataPave Online Web site with the online application ERD Builder. The application is available through the DataPave online application of LTPP-Products online. The application enables users to download longitudinal road profile measurements for all LTPP sections in ERD file format for data analysis. Developed by the Engineering Research Division (ERD) at the University of Michigan Transportation Research Institute, the ERD format facilitates automated plotting of simulation data, experimentally measured data, and data from various analysis programs.
Visitors to the Web site can list dates when profile measurements are made on LTPP sections along with information on the profile measuring equipment used for each monitoring event. This information permits users to select desired profile data and convert it to standard ERD file format for analysis. The LTPP program believes that allowing real-time export of profile data in ERD format from the most current LTPP SDR will help researchers and pavement engineers make better use of the LTPP database for ongoing and future pavement performance analysis and research. |
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