CDOT Performance Data Business Plan - Cambridge Systematics

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CDOT Performance Data Business Plan Section 3 of this report recommends three measures related to congestion – one based on the percent of person miles traveled (PMT) on congested corridors, one on person delay, and another one based on travel time reliability. The first measure is designed to work with CDOT’s existing data, and CDOT is working to develop the second and third. The first measure is based on comparing a highway segment’s traffic volume to its capacity. Developing a cost/benefit curve would require estimating the change in a highway segment’s capacity that could be achieved by implementing a project. This calculation is relatively straightforward for capacity expansion projects but not technically feasible for operations projects. Given that the mobility curve should focus on operations projects and that it is not possible to relate operations projects directly to a highway’s capacity, it is recommended that CDOT hold off on developing a mobility cost/benefit curve until a measure of reliability is developed. When the details of delay and reliability measures have been resolved, a cost/benefit curve could be developed using a project-level approach. This approach would require CDOT to define a list of potential operations projects and to estimate the following information for each: Project cost; Value of the reliability measure on the project segment without the project; and Value of the reliability measure on the project segment with the project. In addition, the projects would need to be ranked from highest to lowest priority. The prioritization could be done based on cost effectiveness (e.g., change in reliability per dollar) or using a more comprehensive approach. Once the list has been prioritized, a cost/benefit curve could be created as follows: Assume a funding level; Work down the list of prioritized projects until these funds are expended; Calculate the cumulative change in reliability expected for the funded set of projects; Plot the resulting value; and Repeat this process for additional funding levels. 6-4 Cambridge Systematics, Inc.
APPENDICES A. Additional Data Collection Recommendations B. CDOT Supporting Measures C. References D. Stakeholder Interview Summary E. CDOT Goals and Objectives F. Example of a Data Business Plan Charter G. Congestion H. Calculation Spreadsheet Pages
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