Resources Available for Checkout!
The CDOT library has a professional staff available to assist staff and members of the general public, contractors, and outside researchers who seek CDOT publications and information.
Services include:
View a variety of eBooks and audiobooks in CDOT’s library collection. Topics include landscape architecture, historical reports, NEPA reports, scenic byways, Equity, Diversity, and Inclusion in Transportation, and Bike to Work Month.
These documents are freely available in our library catalog and in a variety of formats, including print, eBooks, Audiobooks, PDFs, and more. Our collection is constantly growing so check in often to find new publications. If you have any questions or can't find what you are looking for, please email the library.
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CDOT Wildlife Research Presented at International Conference on Ecology and Transportation
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John Kronholm, CDOT Region 3, Northwest Resident Engineer, presented at the International Conference on Ecology and Transportation in June 2023. The study’s objectives were to review and analyze existing data and literature from Colorado and other states to determine if there are optimum structure dimensions for underpasses and overpasses for wildlife including mule deer, elk, pronghorn, moose, and Canada lynx. Of special interest was the size at which increasing structure sizes may reach a point of diminishing returns relative to cost and predicted increase in successful wildlife crossings.
The results were used to help determine the size of a wildlife underpass on Vail Pass I‐70 leading to significant cost savings. The study demonstrated that modeling can be generated to predict passage success rates for wildlife for a wide range of structure dimensions. However, there was no single point of diminishing return where the cost to increase structure size outweighed the predicted increase in wildlife success rate. Learn more through the full research report.
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Air Quality Impacts on Construction Activities
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Over the past three years, a CDOT research project team has collected measurements along the I-270 corridor north of Denver.
In anticipation of the I-270 reconstruction, a network of experimental low-cost sensors measured particulate matter and meteorological parameters.
More costly “mid-tier” instruments were used at several locations to provide reliable baseline measurements and a broader range of measured constituents.
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Although construction has not yet begun, lessons from this research are helping CDOT implement the legislatively required monitoring for regionally significant construction projects around the state. Because of the research, CDOT gained experience with many brands of low-cost and mid-tier units, learned the challenges of low-cost sensor calibration and reliability, and became familiar with the range of available contracted services. Measurements will continue for two more years, capturing more data when construction begins.
Photo: Research project team members set up a low-cost sensor along I-270
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