Dedicated to providing knowledge, the Pavement Research Center uses innovative
research and sound engineering
principles to improve pavement structures, materials, and technologies.

NEWS (Previous News Items)

  • The Caltrans/UCPRC Heavy Vehicle Simulators are currently testing different full-depth pavement reclamation strategies on one of the instrumented test tracks at the UC Davis research facility. The strategies include pulverization with no stabilizer (FDR-NS), pulverization with cement (FDR-PC), pulverization with foamed asphalt/cement (FDR-FA), and pulverization with engineered emulsion (FDR-EE). Testing is currently taking place under soaked conditions on the FDR-FA and FDR-PC test sections. Current load repetition count on the FDR-FA is 700,000 at an 80kN half axle load (36,000lb single axle load) and 300,000 on the FDR-PC at a 40kN (18,000lb) load. Posted 3/16/2015.
  • The LCA 2014 web page with documentation of the Pavement LCA 2014 Symposium has been created and is now LIVE! It includes the program, presentations, papers, results of the breakout sessions, and information about attendees and committees. Follow up meetings on Pavement LCA are being planned for Harbin, China (contact Hui Li for information) and Sun City, South Africa (just before CAPSA, organized by ISAP APE) in August, 2015. Posted 2/6/2015.
  • The UCPRC made podium and poster presentations at the 2015 Transportation Research Board (TRB) Annual Meeting held in Washington, DC on January 11-15, 2015. The presentations covered work sponsored primarily by the California Department of Transportation (Caltrans) as well as the California Air Resources Board (CARB). Posted 1/29/2015.
  • In January 2015, the UCPRC published the fourth and final report based on the Freight-Truck-Pavement interaction pilot study. This logistics augmentation aspect of the study was conducted to examine the ways that public and private sector decision makers approach issues related to road-freight transport in California and to show how direct consultation between the two sectors might align their interests more closely. This project included desktop studies, qualitative analysis, and case studies. Among its other findings, the study concluded that road infrastructure and regulation have a marked impact on the state’s critical supply chain operations and strategies, and that the state may benefit when Caltrans and the private sector engage in the planning and construction of road infrastructure as well in the drafting and implementation of policy. Posted 1/26/2015.
  • Just published on the UCPRC website are the results from the final tasks (Tasks 9 to 11) of a three-phase pilot study (Tasks 1 to 6 and Tasks 7 and 8) undertaken for Caltrans demonstrating the potential economic and other effects of changes in vehicle-pavement interaction caused by varying surface roughness, which can increase from road maintenance delays and pavement management decisions. Undertaken in collaboration with the University of Pretoria and the Council for Scientific and Industrial Research (CSIR) in South Africa, the study used state-of-the-art tools to simulate and measure the peak loads and vertical acceleration of trucks and their freight on a selected range of pavement surface profiles on the state highway system. The study’s aim is to enable Caltrans to better manage the risks of decisions regarding freight and the management and preservation of the pavement network by quantifying the results in economic terms and other effects. Posted 12/16/2014.
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Spring 2015 UCPRC Activities

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Candidate for fully permeable shoulder retrofit validation site

Pavement Sustainability. The Federal Highway Administration (FHWA) has been supporting the dissemination of pavement LCA knowledge and development of pavement LCA guidelines since 2010 through their Sustainable Pavements program. The FHWA has recently published a Towards Sustainable Pavement Systems: A Reference Document, which is a review of pavement systems and best practices for improving their sustainability, and is organized around a life cycle perspective. It also includes an overview of pavement LCA and economic and social sustainability considerations.

The reference document is available at: www.fhwa.dot.gov/pavement/sustainability/.

The FHWA has also published two technical briefs; one provides an overview of pavement sustainability, while the other summarizes Life Cycle Assessment (LCA) as applied to pavements.

The UCPRC was a member of the team that wrote the Reference Document and edited it in consultation with the asphalt and concrete pavement industries. The FHWA team will be presenting webinars on the material in the Reference Document between May and September, 2015. The team is also preparing additional technical briefs on practices to improve the sustainability of concrete and asphalt pavements, and guidelines for pavement LCA.

Tech Briefs are available at: www.fhwa.dot.gov/pavement/pub_listing.cfm?titlestart=t.


Important Note for Caltrans Users: Prior to scheduling pavement preservation (preventive maintenance or CAPM) or roadway rehabilitation work on flexible pavement highway sections, the District Materials Engineer and/or the Project Manager should review this spreadsheet to ensure that the proposed project does not include sections active in the “Quieter Pavement Research” (QPR) testing program. If the proposed project is within a QPR test section, please contact Linus Motumah of the Caltrans Office of Pavement Design before scheduling the work.

To view maps that show where the sections are located, click the following link: http://maps.google.com/maps?q=http://www.ucprc.ucdavis.edu/qpsectionsmap.kmz (or copy-and-paste it into a new browser window for a slightly larger view).

For more information, contact John Harvey of the UCPRC or Linus Motumah.