Proper structural design of pavement systems requires knowing the resilient modulus of the soil as this parameter is a proven predictor of the stress-dependent elastic modulus of soil materials under traffic loading. In addition, the R-value test is conducted using a device called a stabilometer, where the material's resistance to deformation is expressed as a function of the ratio of the transmitted lateral pressure to that of the applied vertical pressure. Both tests are expensive and time consuming; however, establishing accurate and reliable correlations between the test results and the soil's physical properties, in lieu of laboratory testing, can save a considerable amount of time and money in the analysis and quality control process. For these reasons, correlations are typically used for estimating the resilient modulus and R-value for soils. The variability of a given soil type in different regions and states requires developing modified and specific correlations for each state based on statistical analysis of the statewide soil data collected. The main goal of this research study was to develop correlations among R-value, Resilient modulus, and soil's basic properties for available AASHTO soil types in databases in Colorado., by Cara Fragomeni, Ahmadreza Hedayat., "July 2020.", "Report No. CDOT-2020-10" --Cover., "Report no. 2020-07." --Title page., "Prepared in cooperation with the US Department of Transportation, Federal Highway Administration.", Bibliography: pages 92-94., Online resource; title from PDF cover (viewed January 2021), Final report.
Final report., Performed by Atkinson-Noland & Associates in cooperation with the Federal Highway Administration., "December 2001.", Includes bibliographical references (leaf 12)., Mode of access: World Wide Web.
This report contains the documentation and supporting technical notes for a statistical model that estimates changes in the price components of the Colorado Construction Cost Index. The model contains two specifications. In the first, the composite construction index is a function of the producer prices of inputs: oil, concrete, steel, labor and equipment. In the second, the composite construction index is a function of the price of oil, wages and nationwide demand for construction services. Implementation The model has been transferred to Colorado Department of Transportation (CDOT)'s economist, who will maintain and operate it to forecast price inflation in construction costs over a thirty-year period, in support of statewide planning and programming., Peter Mills., Model operating and maintenance instructions -- Technical notes -- Appendices., Performed by Dye Management Group, Inc., sponsored by Colorado Department of Transportation., "Prepared in cooperation with the US Department of Transportation, Federal Highway Administration"--Technical report documentation page., "May 2013.", Includes bibliographical references., Online resource; title from PDF cover (viewed March 2016), Final report.
As recently as 1969 about half the school aged children in the United States walked or bicycled to school. Today fewer than 15% of school children walk or bike to school and as much as 20-30% of morning traffic is generated by parents driving their children to school. Children are less active today and the majority of children living within a 1/2 mile of schools are driven in private vehicles. Obesity rates are on the rise and the cost of obesity and other health related challenges have significant impacts on the rising cost of health care in the Unites States, not to mention the lifestyles of our children. In response to these challenges, in an effort to encourage healthy living, the Colorado Department of Transportation has developed a series of pedestrian and bicycle safety lesson plans in support of the Colorado Safe Routes to School program. These lesson plans, which help educators teach children about safe walking and bicycling, introduce a variety of skills that can help children stay safe while they walk by teaching them skills that will help them safely cross the street. Statistics show that child pedestrians are disproportionately represented in injury crashes and that the typical factors in those crashes that can be mitigated by education and practice., Online resource; title from PDF cover (viewed November 2016)
Final report., Performed by University of Colorado at Boulder Dept. of Civil, Environmental and Architectural Engineering., "May 2002.", Includes bibliographical references (p. 80-83)., Mode of access: World Wide Web.
Final report., Performed by University of Colorado at Denver, Center for Geotechnical Engineering Science for Colorado Department of Transportation in cooperation with the U.S. Department of Transportation, Federal Highway Administration., "June 2002.", Includes bibliographical references (p. 133)., "Report no. CDOT-DTD-R-2002-5.", Mode of access: World Wide Web.
Title from cover., Sponsored by the Colorado Department of Transportation in cooperation with the U.S. Department of Transportation, Federal Highway Administration, "December 6, 2001.", "Report no. CDOT-DTD-R-2001-18.", Mode of access: World Wide Web.
The purpose of this report is to provide the reader with the ten-year analysis for the cost-benefit of hot mix asphalt projects constructed using the three and five-year warranty specifications developed by CDOT. There were eight projects evaluated using the three-year warranty specifications and two projects evaluated using the five-year warranty specifications. Each warranty project was evaluated with a comparable non-warranty (control) project. Overall, 214.6 lane-miles of warranty projects were constructed and compared to 276.6 lane-miles of control projects., Description based on online resource; title from PDF cover; (viewed January 2013), "March 2012.", "Report No. CDOT-2012-1, Final Report.", "Prepared in cooperation with the US Department of Transportation, Federal Highway Administration.", Final report;, Introduction -- Assessment procedure -- I-25 south of Fountain -- C-470, Santa Fe Drive to Wadsworth Boulevard -- U.S. Highway 36, East and West of Superior -- I-25, North of Pueblo -- I-70, East of Eagle -- U.S. Highway 50, East of Kannah Creek -- S.H. 63, South of I-76 Interchange -- I-25, Ray Nixon - South -- U.S. 36, East of Byers -- U.S. 287, North of Ted's Place -- Summary of findings and conclusions -- References -- Appendices., Includes bibliographical references (p. 85).
Sponsored by the Colorado Dept. of Transportation in cooperation with the U.S. Dept. of Transportation Federal Highway Administration., "June 2006.", "Report No. CDOT-2006-19, Final Report.", Mode of access: World Wide Web.
Final report., Performed by the University of Colorado at Boulder Dept. of Civil Engineering, in cooperation with the Federal Highway Administration., "August 1999.", Includes bibliographical references., Mode of access: World Wide Web.
Rising to over 10,000 feet in elevation, the Crest of the Rockies design segment provides access to numerous ski resorts and recreational opportunities through Silverthorne, Frisco, Copper Mountain, Vail, Avon and Edwards. The Crest of the Rockies offers dramatic views of peaks and valleys, steep topography, lush alpine vegetation, rocky hillsides, waterways and views of numerous ski resorts. The Crest of the Rockies design segment contains five Areas of Special Attention (ASA) including the Town of Vail, Top of Vail Pass, Dowds Junction, Herman Gulch and Silverthorne., Description based on online resource; title from PDF caption (viewed January 2018)
by O.D. Hand ; with contributions by Julie Sharer-Price, Margaret A. Van Ness, Priscilla B. Ellwood, Steven M. Wallace., "Transportation project FR 040-2(30), East of Hayden-East.", "September 1993.", "Work conducted under the terms of Colorado archaeological permit nos. 88-2 and 92-4.", Print version record.
