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What's New


TRB Webinar - Wednesday March 11, 2015 1:00 PM - 2:30 PM EDT

LTPP InfoPave™ - Visualization to Facilitate Extraction of Information out of Data

Transportation Research Board (TRB) of the National Academies       LTPP InfoPave™

The Transportation Research Board (TRB) of the National Academies will be conducting a webinar on Wednesday March 11, 2015, from 1:00pm to 2:30pm (Eastern) that will explore the Long-Term Pavement Performance (LTPP) LTPP InfoPave™; the web interface for the Federal Highway Adminstration's pavement performance database. Webinar presenters will highlight layout data analysis examples that demonstrate the utility of LTPP InfoPave™ in providing answers to pavement performance questions. Plans for future improvements and implementation will also be discussed.

Released during the 93rd TRB Annual Meeting in January 2014, LTPP InfoPave™ has received positive response from students, researchers, state department of transportation engineers, and stakeholders. The second release of LTPP InfoPave™ (released during the 94th TRB Annual Meeting in January 2015) includes major enhancements to existing features and a series of new features that further facilitate access to LTPP data. The application of LTPP InfoPave™ enhances data visualizing, selection, and access.

Participants must register in advance of the webinar, and there is a fee ($89) for non-TRB Sponsor or non-TRB Sustaining Affiliate employees.

For further information, including Registration Information, please visit the TRB Webinar Program announcement.


Participate in the 2015 LTPP International Data Analysis Contest

American Society of Civil Engineers (ASCE)

The International Data Analysis Contest is a joint effort between the Long-Term Pavement Performance (LTPP) program of the Federal Highway Administration (FHWA) and the Task Committee on the Long-Term Pavement Performance Contest, a subcommittee of the Highway Pavement Committee of the Transportation and Development Institute (T&DI) of the American Society of Civil Engineers (ASCE).

Initiated in August 1998, the contest is designed to encourage students, professors, highway agencies, and consultants from around the world to use the LTPP data collected over the past two decades. The contest offers a unique opportunity for contestants (primarily students) to work individually or in a team to perform research that will benefit the highway transportation community. Contestants must document their findings in a written paper.

Authors of winning papers will receive a cash prize and an all-expense paid trip to Washington, D.C. to be nationally recognized at the 2016 Transportation Research Board (TRB) 95th Annual Meeting. In addition, winners will present their research topic at one or more of the TRB meeting sessions and will be given the option to have FHWA publish their winning paper, which will be available for researchers worldwide. All participants will receive a letter of recognition from ASCE and FHWA.

Theme: "Use of LTPP Data for Managing Pavement Assets"

Challenge Theme: "Develop Pavement Health or Condition Indices Using the LTPP Data"

Submissions are due by July 17, 2015

For full contest details, please see the attached guidelines: 2015 ASCE-LTPP Contest Guidelines


LTPP SPS-10 Warm Mix Asphalt Experiment - Manitoba: Spring 2015

Manitoba Infrastructure and Transportation

The nomination from Manitoba Infrastructure and Transportation to construct a Specific Pavement Studies-10 (SPS-10) Warm Mix Asphalt (WMA) experiment in Manitoba has been accepted. Construction is scheduled to start in the spring of 2015, and be open to traffic in the summer of 2015. The experimental site is located on Provincial Truck Highway 16, on the eastbound lanes, approximately 100 miles west of Winnipeg.

The experimental site will consist of three core test sections; a Hot Mix Asphalt (HMA) control test section (PV 150/200 Type A), a WMA Foaming Process test section (Water), and a WMA Chemical Additive test section (Evotherm). In addition, the experimental site will have two Supplemental test sections, a WMA Chemical Additive & Foaming Process test section (Evotherm and Water), and a WMA Foaming Process test section (Water).

Experimental Matrix Classification
Moisture:        Dry
Temperature:  Freeze
Traffic:           High


LTPP SPS-2 Concrete Tech Day - North Dakota: December 16, 2014

North Dakota Ready Mix & Concrete Products Association       American Concrete Pavement  Association (ACPA)

The North Dakota Ready Mix & Concrete Products Association in conjunction with the North Dakota Chapter, Inc. - American Concrete Pavement Association (ACPA) will be hosting the North Dakota SPS-2 Concrete Pavement Tech Day on December 16, 2014 in Bismarck, North Dakota. The event will provide the history and performance of the North Dakota SPS-2 Long Term Pavement Performance (LTPP) Concrete Pavement Experiment. It is a unique opportunity to learn about and evaluate firsthand the performance of a national concrete pavement experiment.

Background

The LTPP SPS-2 Experiment is the largest ongoing concrete pavement research program in the United States. Fourteen States constructed this experiment. In 1994, the North Dakota Department of Transportation constructed eighteen (18) test sections on Interstate 94 East Bound, approximately 16 miles west of Fargo, North Dakota. These test sections were constructed as part of the national Long Term Pavement Performance (LTPP) SPS-2 Strategic Study of Structural Factors for Rigid Pavements. North Dakota's test sections are now 20 years old and are still actively being monitored by Long Term Pavement Performance (LTPP).


LTPP New Experiments - Warm Mix Asphalt

LTPP is currently recruiting sections for inclusion to the LTPP Warm Mix Asphalt (WMA) experiment.

Implementing approved WMA experiments within the LTPP program includes test section recruitment, selection, construction, sampling and testing, monitoring and collection of other pertinent data and information.

WMA experiments could be implemented when existing LTPP test sections get overlaid with WMA and move into GPS-6W/7W or by building an SPS-10 experiment. Each SPS-10 project will have one control (HMA) and at least 2 WMA test sections (different WMA categories). The primary factors for an SPS-10 experiment are Moisture (annual precipitation), Temperature (annual freezing index) and Traffic (ESALs), while the secondary factors are the 4 WMA Technology-Foaming, Foaming Additive, Chemical Additive, Organic Additive.

Agency supplemental sections are allowed at each WMA project. With these supplemental sections the Highway Agencies can build additional test sections that will be monitored as part of the LTPP program with varying levels of RAP, additional WMA technologies, layer thickness variation, and other variables of interest to agencies.


LTPP InfoPave™ Lauched at TRB 2014

LTPP InfoPave™       Transportation Research Board (TRB) of the National Academies

LTPP InfoPave™ is the new Web-based system available from the Federal Highway Administration (FHWA) that allows users to tap into the wealth of pavement data available from the FHWA's Long-Term Pavement Performance (LTPP) program.

LTPP InfoPave™ offers a gateway to data from the LTPP test sections, as well as findings from data analyses and extensive documentation for the many aspects of LTPP experiment design, data acquisition, quality control, and data dissemination. Also available are links to LTPP products and tools, including a falling weight deflectometer calibration system and LTPPBind, a software program designed to help highway agencies select the most suitable Superpave asphalt binder performance grade for a particular site. Users can also access an LTPP reference library containing more than 700 electronic documents. To start exploring LTPP InfoPave™, visit www.infopave.com. For more information about the new system or the LTPP program, contact the LTPP Customer Support Service Center, 202-493-3035 (email: ltppinfo@dot.gov).

LTPP InfoPave™ is featured in the FHWA Focus article LTPP InfoPave Goes Live: Your Portal to Pavement Data.


LTPP SPS-2 Concrete Tech Day – Kansas: July 16th & 17th, 2013

Kansas Department of Transportation (KSDOT)       American Concrete Pavement  Association (ACPA)

The Kansas Department of Transportation and the American Concrete Pavement Association (ACPA), Missouri/Kansas Chapter hosted the Kansas SPS-2 Concrete Pavement Tech Day on July 16th & 17th, 2013.

The event provided the history and performance of the Kansas SPS-2 Long Term Pavement Performance (LTPP) Concrete Pavement Experiment. It was a unique opportunity to learn about and evaluate firsthand the performance of a national concrete pavement experiment.

The event started with presentations from the Kansas Department of Transportation, the Federal Highway Administration – Long-Term Pavement Performance (LTPP) program, the American Concrete Pavement Association (ACPA), Missouri/Kansas Chapter, and from the LTPP North Central Regional Office. After the presentations, participants were transported by to the Kansas SPS-2 field site where they were able to review the actual performance of the various sections.

See Event Announcement for more details.

Background

The LTPP SPS-2 Experiment is the largest ongoing concrete pavement research program in the United States. Fourteen States constructed this experiment. In 1992, the Kansas Department of Transportation constructed thirteen (13) test sections on west-bound Interstate-70 just east of Abilene, Kansas. These test sections were constructed as part of the National Long Term Pavement Performance (LTPP) SPS-2 Strategic Study of Structural Factors for Rigid Pavements. Kansas constructed the first SPS-2 project in the United States. Kansas’ test sections are now 21 years old.


LTPP Replaces Field Data Collection Equipment

NEW SURVEY UNITS (Left) REPLACING OLD PROFILERS (RIGHT)

New survey units (Left) replacing old profilers (Right)

LTPP takes delivery of new AMES Engineering Survey UNITS - The new 2012 profilers replaced the 2002 vehicles which had collectively logged more than 1.2 million miles. The new units not only collect longitudinal profile data, but have also added new capabilities. Pavement macro texture measurements are a new data collection element, and all of the data, including ambient and surface temperature, is now referenced with Global Positioning System (GPS) coordinates.

The Northern Regions was heavily involved with the design, acceptance testing and training of the LTPP Team on the new units. Northern then conducted significant stress testing with the data being analyzed in depth before they hit the road collecting LTPP data once again in late June 2013. Now Northern is currently upgrading LTPP’s field and office QC software and the data processing tools for the new units.

UPGRADED FALLING WEIGHT DEFLECTOMETERS - FWD UNITS

LTPP secures new tow vehicles and upgrades the FWDs - Four new 2013 Chevy tow-vehicles replaced the 2000 vans which had collectively logged some 1.1 million miles. The FWD trailers (originally acquired in 1987 were overhauled in 1995 and again in 2002) have again been overhauled and upgraded with new CP15 wireless electronics which replaced the 2003 version of the electronics. As well, sub-meter accurate GPS units were installed to reference all data elements with coordinates. After some shakedown testing and calibration at the regional Calibration center the new system is up and testing. 

The Northern Regions performed the 1995 and 2003 overhaul/upgrades in-house and again in 2013.

LTPP secures new tow vehicles and upgrades the FWDs

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