Engineering Commons^™

Effects Of Aggregate Angularity On Mix Design Characteristics And Pavement Performance, Leonardo T. Souza, Yong-Rak Kim

Nebraska Department of Transportation: Research Reports

No abstract provided.

Effects Of Aggregate Angularity On Mix Design Characteristics And Pavement Performance, Yong-Rak Kim, Leonardo T. Souza

Nebraska Department of Transportation: Research Reports

This research targeted two primary purposes: to estimate current aggregate angularity test methods and to evaluate current aggregate angularity requirements in the Nebraska asphalt mixture/pavement specification. To meet the first research objective, various aggregate angularity tests were estimated with the same sets of aggregates and were compared by investigating their characteristics on testing repeatability, cost, testing time, workability, and sensitivity of test results. For the second objective, the effect of aggregate angularity on mixture performance was investigated by conducting laboratory performance tests (the uniaxial static creep test and the indirect tensile fracture energy test) of five mixes designed with different …

Moisture Sensitivity Of Hot Mix Asphalt Mixtures In Nebraska -- Phase Ii, Ingryd Pinto, Hoki Ban, Yong-Rak Kim

Nebraska Department of Transportation: Research Reports

No abstract provided.

Use Of Ground Penetrating Radar For Construction Quality Assurance O Concrete Pavement, George Morcous, Ece Erdogmus

Nebraska Department of Transportation: Research Reports

No abstract provided.

Behavior And Design Of Buried Concrete Pipes Phase Ii, Ece Erdogmus, Maher K. Tadros

Nebraska Department of Transportation: Research Reports

No abstract provided.

Termination And Anchorage Of Temporary Concrete Barriers, Scott Rosenbaugh, Robert W. Bielenberg, Ronald K. Faller, John R. Rohde, Dean L. Sicking, Karla A. Lechtenberg, James C. Holloway M.S.C.E., E.I.T., John D. Reid

Nebraska Department of Transportation: Research Reports

No abstract provided.

Investigation And Mitigation Of Driver Confusion At Modern Roundabouts, Aemal Khattak, Gregory Mcknight, Karen Schurr, Ram R. Bishu

Nebraska Department of Transportation: Research Reports

Construction of modern roundabouts in place of traditional four-legged intersections is becoming common in the United States. Roundabout negotiation can be confusing for drivers who are not familiar with their use. This research was carried out to identify roundabout elements that play a role in incorrect roundabout negotiation, ascertain driver characteristics prominent in incorrect roundabout negotiation, assess the relative potential for incorrect negotiation amongst different groups of drivers, and suggest measures for improving drivers’ abilities to negotiate roundabouts. Potential for incorrect roundabout negotiation was measured by asking questions in a survey questionnaire related to rules of roundabout negotiation and the …

Performance Limits For 6-In. High Curbs Placed In Advance Of The Mgs Using Mash Vehicles Part:Ii Full-Scale Crash Testing, Karla A. Lechtenberg, Ronald K. Faller, Dean L. Sicking, Robert W. Bielenberg M.S.C.E., E.I.T., Jeffery C. Thiele, John D. Reid

Nebraska Department of Transportation: Research Reports

No abstract provided.

Development Of Field Data For Effective Implementation Of Mechanistic Empirical Pavement Design Procedure, Atorod Azizinamini, Nima Ala, Mohammad Ajmal Stanigzai

Nebraska Department of Transportation: Research Reports

No abstract provided.

Nondestructive Method To Detect Corrosion Of Steel Elements In Concrete, Saeed Javidi Niroumand, Aaron Jon Yakel, Atorod Azizinamini, Marcelo Dasilva

Nebraska Department of Transportation: Research Reports

No abstract provided.

Dynamic Evaluation Of A Pinned Anchoring System For New York State’S Temporary Concrete Barriers, Christopher N. Howard, Cale J. Stolle, Karla A. Lechtenberg, Ronald K. Faller, John D. Reid, Dean L. Sicking

Mid-America Transportation Center: Final Reports and Technical Briefs

Temporary concrete barrier (TCB) systems are utilized in many circumstances, including for placement adjacent to vertical dropoffs. Free-standing TCB systems are known to have relatively large deflections when impacted, which may be undesirable when dealing with limited space behind the barrier (as seen on a bridge deck) or limited lane width in front of the barrier system. In order to allow TCB systems to be used in space-restricted locations, a variety of TCB stiffening options have been tested, including beam stiffening and pinning the barriers to the pavement. These pavement-pinning procedures have been considered time-consuming and may pose undue risk …

Dynamic Evaluation Of New York State’S Aluminum Pedestrian Signal Pole System, Scott K. Rosenbaugh, Ronald K. Faller, Karla A. Lechtenberg, Robert W. Bielenberg, Dean L. Sicking, John D. Reid

Mid-America Transportation Center: Final Reports and Technical Briefs

The New York State Department of Transportation (NYSDOT) mounts pedestrian “hand/man” signals to aluminum

poles and uses frangible transformer bases to allow the system to break away. However, engineers at NYSDOT believed that the material properties of the aluminum poles themselves would allow the pedestrian signal poles to break away without the use of transformer bases. Elimination of the frangible transformer base would result in significant savings.

An aluminum pedestrian signal pole system was erected at the Valmont testing facility and tested with the Valmont- MwRSF/UNL pendulum with crushable nose in accordance with NCHRP Report No. 350 test designation no. …