Center for Transportation Research and Education at Iowa State University
News about transportation research and events at CTRE/Iowa State University
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RSS FEED IDEMS: Center for Transportation Research and Education at Iowa State University
- RFPs for the Smart Work Zone Deployment Initiative
12 separate problem statements and submission instructions included in a single pdf. Proposals due March 31.
Fri, 07 Mar 2008 08:12:00 CST - Go! magazine, February-March 2008
What may the future of transportation hold? Check out a few ideas in the current issue of Go!.
Mon, 25 Feb 2008 09:20:00 CST - Recently completed research: Updated Rule on Work Zone Safety and Mobility
The Federal Highway Administration published the final rule updating 23 CFR 630 Subpart J in September 2004. The revised rule requires agencies using federal funding to address both safety and mobility in planning and construction of roadway improvements. The Iowa Department of Transportation (Iowa DOT) requested the assistance of the Center for Transportation and Research in developing guidance for a policy and procedures to comply with the final rule.
Tue, 05 Feb 2008 09:27:00 CST - Recently completed research: Investigation of Steel Stringer Bridges: Substructures and Superstructures
There are hundreds of structurally deficient or functionally obsolete bridges in the state of Iowa. With the majority of these bridges located on rural county roads where there is limited funding available to replace the bridges, diagnostic load testing can be utilized to determine the actual load carrying capacity of the bridge. One particular family or fleet of bridges that has been determined to be desirable for load testing consists of single-span bridges with non-composite, cast-in-place concrete decks, steel stringers, and timber substructures.
Thu, 31 Jan 2008 13:12:00 CST - Recently completed research: Embankment Quality, Phase 4: Application to Unsuitable Soils
Management of the QC/QA data proved to be one of the most challenging aspects of the pilot project. Implementing use of the G-RAD data collection system has considerable potential to reduce the time required to develop and maintain QC/QA records for projects using the QM-E special provision. In many cases, results of a single Proctor test were used to establish control limits that were used for several months without retesting. While the data collected for the pilot project indicated that the DCP index control limits could be set more tightly, there is not enough evidence to support making a change. In situ borings, sampling, and testing in natural unsuitable cut material and compacted fill material revealed that the compacted fill had similar strength characteristics to that of the natural cut material after less than three months from the start of construction.
Thu, 31 Jan 2008 13:28:00 CST
