CTIP FY 2015 Program
Carbon Fiber Reinforced Polymer Bridge Repair
The goal of this project is to collect data and refine the Carbon Fiber Reinforced Polymer Bridge repair procedure to help make this repair method a more widespread solution for concrete bridges in poor condition. Refined repair procedures will enable construction contractors to perform this repair satisfactorily on a more consistent basis, which will also help to make this repair a prevalent option. The technology will be deployed to repair the prestressed concrete box beams on the Opekiska Whiteday Creek Bridge. The lead agency on this project is the U.S. Army Corps of Engineers.
Driving Surface Aggregate for Unpaved Roads
The goal of this project is to demonstrate Driving Surface Aggregate (DSA) as an effective, economical, and environmentally safer option for surfacing unpaved roads. Federal land management agencies and tribes are the stewards of more than 600,000 miles of unpaved roads. Adoption of this method could better protect natural resources near roads and save money by reducing the frequency of aggregate replacement and road maintenance. This technology will be deployed at Muscatatuck National Wildlife Refuge near Seymour, Indiana, the Savannah District of the Upper Mississippi River National Wildlife Refuge, near Thomson, Illinois, the Finger Lakes National Forest in New York, and the Green Mountain National Forest in Vermont. The U.S. Forest Service is the lead agency.
Cold Weather Concreting
The goal of this project is to demonstrate the effectiveness of using cold-weather concrete technology in extending the concrete construction season, so concrete can be mixed, placed and cured in subfreezing temperatures, without having to construct enclosures and install heaters in the temporary structures. The project demonstrations will build upon the research and testing that has been performed by the USACE Cold Regions Research and Engineering Laboratory. The technology will be deployed in an ADA walkway at the St Croix National Historic Site; on a sidewalk in the Green Mountain National Forest, and in a concrete pad within the Hartland Dam Recreation Area, Vermont. The U.S. Forest Service is the lead agency.
Integrally Cured Concrete (ICC)
The goal of this project is to demonstrate how to extend the life and durability of concrete by providing internal curing of the concrete by substituting highly absorptive lightweight fine aggregate for a portion of the normal fine aggregate. ASTM International released a new standard specification for Lightweight Aggregate for Internal Curing of Concrete that provides test methods and information for evaluating and incorporating lightweight, absorbent aggregates for internal curing of concrete. This project will develop a refined guide specification, lessons learned, and recommended best practices for application by FLMAs and tribes. This technology will be deployed on the Fort Pulaski National Monument Bridge near Savannah, Georgia. FHWA is the lead agency.
Innovative and Sustainable Transportation Evaluation Process (INSTEP)
The goal of this project is to demonstrate the use of INSTEP as a tool to facilitate the sustainable development of transportation projects. INSTEP is a non-prescriptive, sustainability evaluation, guidance, and education system. The open database platform will allow users to access best practices, compile data-driven sustainability oriented performance metrics across a range of agency transportation projects, and enable reporting associated with overarching federal sustainability guidance. The construction and design module will be piloted on 10 projects within the Bureau of Land Management, U.S. Forest Service and National Park Service (NPS). The NPS is the lead agency.
High Friction Surface Treatments (HFST)
The goal of this project is to demonstrate the application of safety-enhancing high-friction surface treatments at critical locations to improve pavement surface skid-resistant properties. Critical locations, like horizontal curves, make up a small percentage of U.S. highways. However, more than 25 percent of fatal crashes occur on horizontal curves. Adoption of this cost effective innovative technique has the potential to reduce run-off-road crashes and save lives on federal and tribal roadways. Treatments will be deployed at two locations in the Wynoochee National Forest near Grays Harbor, Washington, in the Grand Teton National Park and at two locations in the Great Smoky Mountains National Park. The lead agency is FHWA.
Temporary Road Surface Mats
The goal of this project is to demonstrate the temporal, monetary, and natural resource benefits of using the temporary mats to bridge across soft, wet, and sensitive areas. Extensive work and research relevant to the project has been completed by the U. S. Army Corps of Engineers, Engineer Research and Development Center (ERDC). The ERDC has developed a selection matrix based on performance to assist potential users in making informed decisions on which mat system will best spread the load of heavy vehicles over wet and sensitive soils before system procurement. The matrix will be used to select and deploy a variety of mats to bridge areas in the Apalachicola and the Allegheny National Forests in Florida. The lead agency is the U.S. Forest Service.
Insulated Pavement
The goal of this project is to demonstrate the effectiveness of placing a layer of extruded polystyrene between the subgrade and base course in a pavement structure. This insulating layer prevents frost from penetrating into the first susceptible subgrade, and ultimately prevents damage from frost action. More specifically, since the subgrade does not experience freezing temperatures, it doesn't freeze, and in turn doesn't undergo thaw weakening, which, in combination with traffic, results in rutting and cracking. Similarly, since the subgrade doesn't freeze, there is minimal frost heaving and resulting cracking from differential frost heave. This innovative technology will be deployed in the Kootenai National Forest, Montana and a similar section at the St. Gaudens National Historic Site in New Hampshire. The U. S. Forest Service is the lead agency.
Dynamic Warning Systems to Alert Motorists to the Presence of Bicyclists (Dependent on Available Funding) or (If Additional Funding Becomes Available)
The goal of this project is to deploy inductive loops, an existing technology used to count or detect bicyclists, with a flashing beacon warning system to alert drivers to the presence of cyclists along shared roadways. The warning system will be triggered only when a cyclist is present, making it "dynamic". The warning system will be deployed in the Colorado National Monument and on access roads to the John Day Fossil Beds, Oregon and Gallatin National Forest, Montana. The U. S. Fish & Wildlife Service is the lead agency.