CTIP Publications

Overview of process for stabilizing roads affected by forest fires. Explores the use of turf mats as a temporary or permanent solution to allow vegetation regrowth and facilitate road repair.

Overview of process for applying paper mill boiler ash to unsurfaced roads.

This White Paper addresses the generation and transmission of blast energy and the effects that overpressuresand vibrations can have on fish and fish habitat. Management challenges that arise when planning and executing blasting projects are discussed. Scientific studies correlating blasting with impacts to fish and recommended guidelines that limit vibrations, overpressures, and sound pressure levels were reviewed. An overview of mitigation techniques and examples of successful projects are presented.

The roadside represents the interface between the roadway and the surrounding environment, and plays an important role in protecting the larger ecosystem. Roadsides are dynamic environments that require unique treatments and restoration approaches. This guide presents an integrated and holistic approach to incorporating sustainable solutions into disciplines such as hydraulic, geotechnical, aesthetics and vegetation, among others.

This handbook provides numerous solutions to wildlife-vehicle interactions by offering effective and safe wildlife crossing examples. Key design and ecological criteria, construction and maintenance guidelines, and effective monitoring techniques are shown and described in this handbook's practical application examples called Hot Sheets.

This Technical Brief provides an overview of the cold weather admixture systems (CWAS) methodology to mix, place, and cure concrete at or below freezing air temperatures. Benefits, temperature limitations, and applications of CWAS are presented. Adoption of the specifications are recommended. Considerations for contracting, familiarizing the contractors prior to construction, and lessons learned from the demonstration are discussed.

Collaborative effort between agency and contractors to evaluate the viability of warm mix technology as a standard construction practice. The demonstration evaluated two different WMA technologies (Advera and Sasobit) on a construction project on the East Entrance Road of Yellowstone National Park.

Chemical treatment systems (CTS) are implemented in areas where traditional, physical erosion and sediment control practices will not meet water quality goals for construction site runoff. This report provides a technically credible basis for best management practices for the use of CTS for turbidity reduction on road construction projects and identifies the most important variables to address when selecting chemical treatment best management practices for a particular site.

This Technical Brief provides an overview of the benefits, limitations, and applications of Internally Cured Concrete for bridge decks. Considerations for specifications, contracting, construction, and maintenance are discussed.

An overview of an innovative road construction/reconstruction method that was demonstrated at two Federal land management agency sites to address reducing damage to low-volume pavements due to detrimental effects of frost action. Considerations for design and construction of insulated pavements to reduce road maintenance, as well as performance measures to quantify the effect of the insulating layer, are discussed.

Context sensitive designs in transportation are key to developing facilities that fit within the engineered setting, preserving scenic, aesthetic, historic and environmental resources while maintaining motorist safety and mobility. This report provides design, construction, and maintenance solutions for rock slope excavation, stabilization, and mitigation in context sensitive regions. It addresses state-of-the-art and state-of-practice technologies for the evaluation, design, and construction of context sensitive rock slopes.

Context sensitive designs in transportation are key to developing facilities that fit within the engineered setting, preserving scenic, aesthetic, historic and environmental resources while maintaining motorist safety and mobility. This report provides design, construction, and maintenance solutions for rock slope excavation, stabilization, and mitigation in context sensitive regions. It addresses state-of-the-art and state-of-practice technologies for the evaluation, design, and construction of context sensitive rock slopes.

Rockeries consist of earth retaining and/or protection structures comprised of interlocking, dry-stacked rocks without mortar or steel reinforcement. The report provides a rational design methodology, which evaluates rockery stability as a function of the rockery geometry (height, base width, and batter), rock properties and placement, and lateral pressure imposed by the backfill materials.

This Technical Brief provides an overview of using an ATV, a flat-bed trailer, and a pressurized spray bar, a simple method to reduce road dust is now available for use by rural and remote communities. With an ATV pulling a trailer-mounted tote filled with a dust palliative, the material is then easily sprayed from the back of the trailer onto a prepared unpaved roadway surface.