June 2017 Vol. 25, No. 2

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Small Town and Rural Multimodal Networks
Institution: Alta Planning + Design (Alta)
Report No: FHWA-HEP-17-024
Date: December 2016
The U.S. Federal Highway Administration has released a report that provides resources intended to help small towns and rural communities support safe, accessible, comfortable, and active travel for people of all ages and abilities.

Investigating the Effectiveness of Using Bluetooth Low-Energy Technology to Trigger In-Vehicle Messages in Work Zones
Institution: Department of Civil, Environmental and Geo-Engineering & Department of Mechanical Engineering University of Minnesota
Report No: MN/RC 2016-38
Date: December 2016
The Minnesota Department of Transportation has released a report that examines the effectiveness of using in-vehicle messages to heighten drivers’ awareness of pertinent work zone information.

Historical Performance Evaluation of Iowa Pavement Treatments Using Data Analytics
Institution: Construction Management and Technology Program Institute for Transportation Iowa State University
Report No: DTRT13-G-UTC37
Date: January 2017
The Institute for Transportation at Iowa State University has released a report that evaluates the performance of pavement treatments and estimates their performance lives to support future maintenance and rehabilitation decisions.

Bringing Smart Transport to Texans: Ensuring the Benefits of a Connected and Autonomous Transport System in Texas – Final Report
Institution: Center for Transportation Research The University of Texas at Austin
Report No: FHWA/TX-16/0-6838-2
Date: November 2016
The Center for Transportation Research at the University of Texas at Austin has released a report that demonstrates a variety of smart-transport technologies, policies, and practices for highways and freeways using connected autonomous vehicles, roadside equipment, and related technologies.

Setting Work Zone Speed Limits
Institution: Center for Transportation Research and Education Institute for Transportation Iowa State University
Report No: InTrans Project 15-536
Date: January 2017
The Institute for Transportation at Iowa State University has released a report that evaluates the impacts of speed limit reductions within work zones on drivers’ speed selection at both aggregate and disaggregate levels.

Evaluation of Laboratory Friction Performance of Aggregates for High Friction Surface Treatments
Institution: Evaluation of Laboratory Friction Performance of Aggregates for High Friction Surface Treatments
Report No: NCAT Report 17-01
Date: January 2017
The National Center for Asphalt Technology at Auburn University has released a report that evaluates the friction performance of aggregates in a laboratory environment.

Modeling the Performance Properties of RAS and RAP Blended Asphalt Mixes Using Chemical Compositional Information
Institution: Illinois Sustainable Technology Center Prairie Research Institute University of Illinois, Urbana‐Champaign
Report No: FHWA‐ICT‐17‐001
Date: January 2017
The Illinois Center for Transportation at the University of Illinois, Urbana-Champaign has released a report that investigates chemical characterization and rheological properties of binders from various sources in order to study the effects of aging and increasing asphalt binder replacement levels.

Seismic Rehabilitation of Skewed and Curved Bridges Using a New Generation of Buckling Restrained Braces
Institution: Department of Civil and Environmental Engineering University of Utah
Report No: MPC 16-315
Date: December 2016
The Upper Great Plains Transportation Institute at North Dakota State University has released a report that analyzes configurations for using buckling restrained braces in both skewed and curved bridges for reducing the effects of strong earthquakes.

Development of a 3/4-Inch Minus Base Course Type A Specification For Montana
Institution: Western Transportation Institute
Report No: FHW A/MT16-015/8228-001
Date: December 2016
The Montana Department of Transportation has released a report that addresses the development of a standard specification for a new gravel base course with nominal maximum aggregate size of ¾ inch.

Considerations for Development of Inspection and Remedial Grouting Contracts for Post-tensioned Bridges
Institution: Wiss, Janney, Elstner Associates, Inc.
Report No: MN/RC 2017-04
Date: January 2017
The Minnesota Department of Transportation has released a report that details the second phase of a two-phase project in order to identify best practices for the investigation of post-tensioned tendon conditions in bridge structures constructed prior to 2003. Bridges constructed before this date used grouting materials and practices than often resulted in the formation of air- or water-filled pockets inside post-tensioned tendons.

Feasibility of Vibration-Based Long-Term Bridge Monitoring Using the I-35W St. Anthony Falls Bridge
Institution: Department of Civil, Environmental and Geo-Engineering University of Minnesota
Report No: MN/RC 2017-01
Date: January 2017
The Minnesota Department of Transportation has released a report that analyzes vibration and temperature data from the monitoring system on the I-35W St. Anthony Falls Bridge. This information will be used to test the relationship between the dynamic signature of a concrete structure and temperature.

Work Zone Simulator Analysis: Driver Performance and Acceptance of Missouri Alternate Lane Shift Configurations
Institution: Missouri University of Science and Technology Department of Engineering Management and Systems Engineering
Report No: cmr 17-002
Date: February 2017
The Missouri Department of Transportation has released a report that evaluates the Missouri Department of Transportation (MoDOT)’s alternate lane shift sign configuration for work zones. The simulation project was developed in response to the single sign proposed by MoDOT, as opposed to drivers seeing two signs, as was the case from the Manual on Uniform Traffic Control Devices (MUTCD).

Preventing Transverse Bumps and Cracks in New Asphalt Overlays over Crack Sealants
Institution: Colorado Department of Transportation-Research
Report No: CDOT-2016-04
Date: January 2017
The Colorado Department of Transportation has released a report that presents results of a five-year study designed to identify factors that relate to the appearance of bumps and consequent cracks. These bumps occur when a hot mix asphalt overlay is placed on top of a pavement containing crack sealants. They can become progressively more severe upon further compaction.

Evaluation of Recycled Aggregates Test Section Performance
Institution: Center for Transportation Research and Implementation Minnesota State University, Mankato
Report No: MN/RC 2017-06
Date: February 2017
The Minnesota Department of Transportation has released a report that evaluates the performance of recycled concrete aggregate (RCA) as compared to other concrete pavements. Objectives of the study include assessing the current state of practice across the nation, conducting experimental investigations using RCA in concrete, and assessing the sustainability and the economics of using RCA in concrete.

State of the Practice for Shoulder and Center Line Rumble Strip Implementation on Non-Freeway Facilities
Institution: Vanasse Hangen Brustlin, Inc. (VHB)
Report No: FHWA-HRT-17-026
Date: March 2017
The U.S. Federal Highway Administration has released a report that develops a rumble strip decision support guide to inform agencies on center lane rumble strips (CLRS) and shoulder rumble strips (SRS) installation. This report also documents the current state of the practice for CLRS and SRS installation, conducts a gap analysis, and provides a framework for future research related to further implementation of rumble strips. CLRS and SRS are proven countermeasures for reducing roadway departure crashes, including head-on and run-off-road crashes.

Evaluation of Alternative Pozzolanic Materials for Partial Replacement of Portland Cement in Concrete
Institution: Department of Civil and Coastal Engineering Engineering School of Sustainable Infrastructure & Environment University of Florida
Report No: BDV31-977-06
Date: September 2016
The Florida Department of Transportation (FDOT) has released a report that explores alternative materials that can be used to replace some or all the fly ash that is currently required in FDOT concrete mixes. This research was undertaken due to the recently diminished supply of class F coal fly ash throughout the United States because of natural gas and alternative energy supply, as well as environmental restrictions.

Seismic Retrofit of Spliced Sleeve Connections for Precast Bridge Piers
Institution: Mountain-Plains Consortium Region 8
Report No: MPC 17-321
Date: March 2017
The Upper Great Plains Transportation Institute at North Dakota State University has released a report that examines a repair technique for precast reinforced concrete bridge column-to-footing and column-to-pier cap joints. The repair utilizes prefabricated carbon fiber-reinforced polymer shells, epoxy anchored headed mild steel rebar, and non-shrink concrete to relocate the column plastic hinge.

Distribution factors for construction loads and girder capacity equations
Institution: University of Florida Department of Civil and Coastal Engineering
Report No: BDV31-977-46
Date: March 2017
The Florida Department of Transportation has released a report that examines some of the stages of highway bridge construction from a structural safety and design perspective. The report aims to update the previously developed capacity equations for wind load and gravity load and to develop empirical construction stage distribution factor equations at multiple levels of design conservatism.

Validation of Hot-Poured Crack Sealant Performance-Based Guidelines
Institution: Virginia Center for Transportation Innovation and Research
Report No: FHWA/VTRC 16-R
Date: March 2017
The Illinois Center for Transportation at the University of Illinois Urbana-Champaign has released a report that summarizes a research effort to validate thresholds for performance-based guidelines and grading systems for hot-poured asphalt crack sealants. This report also evaluates the short-term and long-term aging effects of hot-poured crack sealants through a differential aging test.

Using Falling Weight Deflectometer Data with Mechanistic Empirical Design and Analysis, Volume II: Case Study Reports
Institution: Applied Pavement Technology Inc.
Report No: FHWA-HRT-16-010
Date: March 2017
The U.S. Federal Highway Administration has released a report that examines the use of the falling weight deflectometer (FWD) as part of mechanistic-empirical pavement design and rehabilitation procedures. This document, part of a three-volume report, evaluates how FWD deflection data are used in the rehabilitation portion of the Mechanistic-Empirical Pavement Design Guide.