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Research

Price Indexing in Transportation Construction Contracts

When market prices of cement, steel, asphalt, fuel or other commodities used in transportation infrastructure construction are increasing, state departments of transportation (DOTs) will typically be faced with demands from their contractors that price indexing or cost escalation clauses be incorpor
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Research

Rheological Characterization of Flow Table Reference Material

The objectives of this research are to (1) fully characterize the reference material used in (a) AASHTO M 152, “Flow Table for Use in Tests of Hydraulic Cement,” (b) AASHTO T 71, “Effect of Organic Impurities in Fine Aggregate on Strength of Mortar”; T 137 (ASTM C185), “Air content of Hydraulic Ceme
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Research

Application of AASHTO LRFD Specifications to Design of Sound Barriers

The current design criteria for sound barriers are based on the AASHTO Standard “Guide Specifications for Design of Sound Barriers” dated 1989 and interims through 2002. The content of the AASHTO Guide Specifications for design of sound barriers is not consistent with the requirements of the AASHTO
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Research

Update of the AASHTO Guide for the Planning, Design, and Operation of Pedestrian Facilities

The 1st Edition of the AASHTO Guide for the Planning, Design, and Operation of Pedestrian Facilities (AASHTO Pedestrian Guide) was published in 2004 and reflects the state of the practice in 2001 – 2002 when it was written. Being the first edition, this guide may need some content changes or additio
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Research

Seismic Isolation Design Examples of Highway Bridges

The objective of this research was to develop the Third Edition of the AASHTO Guide Specifications for Isolation Design with examples.
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Best Practice

Best Practices for Implementing Quality Control and Quality Assurance for Tunnel Inspection

The objective of this project is to develop guidelines for owners to use in selecting practices for tunnel inspection, operational safety and emergency response systems testing, and inventory procedures to improve the safety of highway tunnels.
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Research

Safety Impacts of the Emerging Digital Display Technology for Outdoor Advertising Signs

This topic will review on-going human factor studies and guidelines with regard to highway agency DMS’s and CMS’s now in use on highways. The panel noted that the panel for this topic should include a representative from the outdoor advertising industry. The final report has been submitted and copi
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Research

Replacement Process for LED (Light Emitting Diode) Traffic Signals

As an initial step in developing maintenance guidelines for LED traffic signals, this project developed a process for determining when LED traffic signal heads should be replaced. Task 1. Synthesize existing human factors research relevant to the visibility of traffic signals, updating it as ap
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Presentation

Purdue Presentations January 26 and 27 2016: Salt Lake City Utah

Purdue Presentations January 26 and 27 2016: Salt Lake City Utah

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Presentation

TSM&O Research Coordination & Highlights of the 2016 TRB Annual

TSM&O Research Coordination & Highlights of the 2016 TRB Annual

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