March 2019 Vol. 27, No. 1

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The Shelf

Minnesota LTAP partners with the MnDOT Library to operate a state-of-the-art service that can help you track down almost any resource from Minnesota or beyond. Questions? Contact Marilee Tuite, Minnesota LTAP librarian, 612-626-8753, ctslib@umn.edu.

Innovative and Economical Steel Bridge Design Alternatives for Colorado
Colorado DOT
The Colorado Department of Transportation has released a report that analyzes an alternative simple-made-continuous (SMC) connection scheme that uses steel diaphragms.

Use of Biocementation for Slope Stabilization of Levees
Midwest Transportation Center
The Institute for Transportation at Iowa State University has released a report that identifies the most practical method for performance of levee slopes under various flooding conditions.

Field Implementation of Rubberized Chip Seal
Missouri DOT
The Missouri Department of Transportation has released a report that investigates field chip seal section with different crumb rubber replacement ratios.

Investigation of Cracking Resistance of Asphalt Mixtures and Binders
MnDOT
In this study, the viability of using three test methods for asphalt mixtures and one test method for asphalt binders are investigated.

GEOSYNTHETIC REINFORCED SOIL - INTEGRATED BRIDGE SYSTEM (GRS-IBS)
Montana DOT
The structure built at the South Fork Dry Fork Marias River crossing was been selected for an innovative technology that has been tested in other states and has been proven to work.

Evaluation of Work Zone Split Traffic Symbol Sign
Midwest Transportation Center at Missouri DOT
The Institute for Transportation at Iowa State University has released a report that evaluates the use of alternative signage for closure of a middle lane in a freeway work zone on a bridge rehabilitation project.

Pavement Surface Treatments for Ice-Prone Locations in the Illinois Highway System
Illinois DOT(SPR) Bureau of Research
The Illinois Center for Transportation at the University of Illinois at Urbana-Champaign has released a report that evaluates effective and durable pavement surface treatments (PSTs) suitable for implementation at Illinois Department of Transportation ice-prone locations.

Safety and Operations Guidance for Using Time-of-Day Protected-Permissive Left-Turn Phasing Using Flashing Yellow Arrows
Virginia DOT Federal Highway Administration
The Virginia Department of Transportation has released a report that defines guidance for selecting the appropriate left-turn mode based on prevailing traffic conditions by time of day.

Assessing Bridge Characteristics for Use and Importance as Roosting Habitats for Bats
Iowa DOT
The Iowa Department of Transportation has released a report that investigates how, why, and when bats use bridges as roosting sites.

Why are Bike-Friendly Cities Safer for All Road Users?
Mountain-Plains Consortium
Identifies if and how high-bicycling-mode-share cities are safer for all road users.