This report provides information on the design considerations of the embedded highway lighting design on Interstate-25 in Trinidad, Colorado, in terms of visibility. The information is based on visibility characterizations of small targets using luminance, illuminance, and contrast calculations as well as participant input on the detectability of small targets., Travis N. Terry, Ronald B. Gibbons., "February 2014.", Bibliography: page 47., "Sponsored by the Colorado Department of Transportation, in cooperation with the U.S. Department of Transportation, Federal Highway Administration.", Report no. CDOT 2013-17., Final report., Online resource; title from PDF cover (viewed March 2016)
An adequate longitudinal joint tie bar system is essential in the overall performance of concrete pavement. Excessive longitudinal joint openings are believed to be caused by either inadequate tie bar size or spacing or improper tie bar installation. If designed and installed properly, tie bars prevent the joints from opening and consequently improve load transfer efficiency between slabs and between slabs and shoulders, resulting in increased load carrying capacity. CDOT should adopt the mechanistic-empirical tie bar design procedure developed in this study., "Report No. CDOT-20011-12. Final Report."--Cover., Description based on online resource; title from PDF title page (viewed December 2011), "'September 2011.", "Sponsored by the Colorado Department of Transportation in cooperation with the U.S. Department of Transportation, Federal Highway Administration.", Includes bibliographical references (p. 84-85)
The results of this study confirm the performance of the baseline CDOT bridge deck mixes/systems, indicate some new products that show promise for implementation, and suggest that combinations of products might be the best approach to protection for Colorado bridge decks exposed to deicing chemicals., "December 2006.", "Report No. CDOT-2006-4.", Mode of access: World Wide Web.
This study sought to determine the technical feasibility of using seismic techniques to measure the laboratory and field seismic modulus of lime-stabilized soils (LSS), and to compare/correlate test results from bench-top (free-free resonance) seismic testing on LSS cylinders to in-situ (surface seismic) testing performed on field-constructed LSS. In addition, this research sought to develop a pilot specification for quality assurance (QA) of LSS using seismic test methods., by principal investigators, Michael A. Mooney, Richard G. Bearce., "Prepared in cooperation with the US Department of Transportation, Federal Highway Administration"--Technical report documentation page., "Prepared by Colorado School of Mines Dept. of Civil and Environmental Engineering.", "August 2013.", Bibliography: pages 74-76., Report no. CDOT 2013-15., Grant number 80-30, Final report., Online resource; title from PDF cover (viewed March 2016)
Final report., Performed by The SeaCrest Group in cooperation with the Federal Highway Administration for Colorado Dept. of Transportation at the request of the Colorado Association of Ski Towns (CAST) under contract no., "October 30, 2001.", Includes bibliographical references (p. 111-117)., Mode of access: World Wide Web.
Final report., Performed in cooperation with the Federal Highway Administration., "July 2002.", Includes bibliographical references (leaf 9)., Mode of access: World Wide Web.
Construction report., Cover title., Prepared in cooperation with the Federal Highway Administration., "March 1996.", Description based on print version record.
A report that evaluates the stability of re-vegetation of high elevation, decomposed, granite cut-slopes by using repeated applications of soil amendments., prepared by Vic Claassen., Introduction -- Methods -- Results -- Conclusions and recommendations -- References -- Appendix A: Reference graphs for N release from previous studies., "Sponsored by Colorado Department of Transportation in cooperation with the U.S. Department of Transportation Federal Highway Administration, Colorado Department of Transportation - Research Branch.", "July 2013.", Includes bibliographical references., Report no. CDOT 2013-14., Final report., Online resource; title from PDF cover (March 2016)
Poor bonding between asphalt pavement overlays and the substrate pavement layer can greatly influence the long term performance of hot mix asphalt (HMA) in the form of premature cracking and fatigue. The primary method to achieve bonding between layers is by hot mix asphalt (HMA) in the form of premature cracking and fatigue. The primary method to achieve bonding between layers is by using an asphalt emulsion tack coat. Additionally, field staff is charged with determining whether an existing pavement, especially a milled surface, is clean enough prior to tack coat placement, to ensure an adequate bond., Scott Shuler., "May 2018.", "Performed internally by CDOT-Research Office and Colorado State University.", Report No. CDOT-2018-14, Online resource; title from PDF cover (viewed August 2019)
In 2002, CDOT undertook this study in an effort to better understand the complexities of the Federal Highway Administration's new Traffic Noise Model (TNM). The research involved three analysis., "Report No. CDOT-2005-21.", "November 2006.", "Sponsored by: Colorado Department of Transportation In Cooperation with the U.S. Department of Transportation Federal Highway Administration.", Includes bibliographical references (p. 30).
This research is being conducted to evaluate the performance of various pavement preservation treatments over time and under different environmental conditions to quantify the economics of each treatment type. There are three primary techniques utilized in Colorado for preservation of asphalt pavements and three for concrete pavements., "October 2010.", "Report No. CDOT-DTD-R-2010-3.", "Final report.", "Sponsored by Colorado Department of Transportation in cooperation with the US Department of Transportation, Federal Highway Administration.", Includes bibliographical references (p. 134-135, A-41-A-43), Mode of access: World Wide Web.
This research is being conducted to evaluate the performance of various preventive maintenance treatments over time and under different environmental conditions to assess the economics of each treatment type., "May 2006.", "Report No. CDOT-DTD-R-2006-6.", "Sponsored by Colorado Department of Transportation in cooperation with the US Department of Transportation, Federal Highway Administration.", Includes bibliographical references (p. 74-76)., Mode of access: World Wide Web.
In 2006, CDOT initiated development of a specification for aggregates used in truck arrester beds. First, it was necessary to know what was currently in the arrester beds throughout the state. Each bed needed to be evaluated for safety, performance, and maintenance needs., January 2008., "Report No. CDOT-2008-1, Final Report.", Mode of access: World Wide Web.
by Christian J. Zier [and others] ; prepared for Environmental Programs Branch, Colorado Department of Transportation ; prepared by Centennial Archaeology, Inc., "July 2005.", "All Work Performed under the terms and Conditions of State of Colorado Archaeological Permit No. 2004-73.", "Colorado Department of Transportation Project STU C120-007"--Cover., Includes bibliographical references (pages 30-33)., Print version record.
This report provides a summary of the roadway characteristics, multimodal facilities, and traffic and safety conditions; identifies infrastructure deficiencies; and summarizes important existing environmental resources in the U.S. Highway 34 (US 34) Planning and Environmental Linkages (PEL) Study Area. This information will be used to determine if obtaining additional data is required, to assess improvement needs, and to guide the development of corridor alternatives. The existing conditions presented in this report represent a snapshot in time current to September 15, 2017, and will be used to determine additional data collection needs for the PEL., prepared for Colorado Department of Transportation ; by CH2M HILL, Inc., "March 2018.", Online resource; title from PDF cover (viewed June 2018), Final.
Ahmad Ardani., Prepared in cooperation with the Federal Highway Administration., "March 1992.", Bibliography: pages 23-24., Final report., Cover., Print version record.
