March 2017 Vol. 25, No. 1

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The Shelf

Evaluation of Portland Cement Concrete with Internal Curing Capabilities
Louisiana Transportation Research Center, FHW A/LA.16/569 (September 2016)
The Louisiana Department of Transportation and Development has released a report that evaluates several curing methods for Portland cement concrete.

Investigation of Shear Distribution Factors in Prestressed Concrete Girder Bridges
Department of Civil, Environmental, and Geo- Engineering University of Minnesota, MN/RC 2016-32 (September 2016)
The Minnesota Department of Transportation has released a report that investigates the accuracy of existing shear distribution factors, which are used to estimate bridge system live load effects on individual girders, and provide recommendations on shear distribution to be used in Minnesota.

Economic Impact of Multi-Span, Prestressed Concrete Girder Bridges Designed as Simple Span versus Continuous Span
Bridge Engineering Center Iowa State University, DTRT13-G-UTC37 (October 2016)
The Institute for Transportation at Iowa State University has released a report that compares the economic impact of designing pre-tensioned prestressed concrete beam bridges utilizing the continuity developed in the bridge deck versus the Iowa Department of Transportation’s method of utilizing standardized spans treated as simply supported. 

Refined Limiting Strain Criteria and Approximate Ranges of Maximum Thickness for Designing Long-Life Asphalt Pavements
National Asphalt Pavement Association, NCAT Report 15-05R (November 2016)
The National Center for Asphalt Technology at Auburn University has released a report that determines critical pavement design thresholds and approximate ranges of maximum thicknesses for flexible pavements in an effort to improve the cost effectiveness of long-life asphalt pavements.

Improving the Effectiveness of Smart Work Zone Technologies
llinois Center for Transportation, Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign, FHWA-ICT-16-021 (November 2016)
The Illinois Center for Transportation at The University of Illinois at Urbana-Champaign has released a report that evaluates the effectiveness of sensor network systems for work zone traffic estimation.

Guide to the Prevention and Restoration of Early Joint Deterioration in Concrete Pavements
National Concrete Pavement Technology Center Iowa State University, IHRB Project TR-697 (December 2016)
The Institute for Transportation at Iowa State University has released a report that discusses strategies for preventing or limiting premature joint deterioration due to salt reactivity and joint saturation.

Texas Precast Concrete Pavement Intersection Demonstration Project
Applied Research Associates, Inc., FHW A-HIF-17-017 (December 2016)
The U.S. Federal Highway Administration has released a report that provides details of the precast concrete pavement use for rehabilitation of a distressed asphalt concrete pavement in Texas.

Risk Factor Identification
Center for Transportation Research and Education Institute for Transportation Iowa State University, InTrans Project 15-551 (December 2016)
The Institute for Transportation at Iowa State University has released a report that seeks to identify risk factors for traffic crashes on two facility types in Iowa: intersections and horizontal curves.

Evaluation of Shear Connectors in Composite Bridges
New Zealand Heavy Engineering Research Association, NZ Transport Agency Research Report 602 (December 2016)
The New Zealand Transport Agency has released a report that reviews international experiments for shear connectors and the development of design equations in different national standards of composite bridges.

Development of Guidelines for Transportation of Long Prestressed Concrete Girders
Wiss, Janney, Elstner Associates, Inc., FHW A/LA.16/567 (December 2016)
The Louisiana Department of Transportation and Development has released a report that investigates the behavior of two long prestressed concrete girders during lifting and transportation from the precast yard to the bridge site, with a particular focus on cracking concerns during transport.

Small Town and Rural Multimodal Networks
FHWA-HEP-17-024 (December 2016)
Translates existing street design guidance and best practices for bicycle and pedestrian safety and comfort to the rural context, and provides examples of how to interpret and apply these design practices to create safe, accessible, and comfortable multimodal networks.