2018-6. October 3, 2018. This modified Form 464 reflects that designers are encouraged to support design exception variance requests with Data Driven Safety Analysis (DDSA) when practical.
Design Bulletins
Updated on August 10, 2020
2018-5. Form #464 references have been deleted from the Procedural Directive 605.1 since the form is no longer used for curb ramps
2018-4. July 30, 2018. This is the new Chapter 12, "Accessible Pedestrian Design" for the CDOT Roadway Design Guide. It is derived from the Public Rights-of-Way Accessibility Guidelines (PROWAG). Topics range from general ADA requirements to a deeper dive on curb ramp and pedestrian access route technical requirements. Designers and field staff are strongly encouraged to familiarize themselves with the range of Americans with Disabilities Act (ADA) topics.
2018-3. May 22, 2018. The bulletin describes the Earthwork Tool, which is a synthesis of best practices to guide designers toward CDOT standard earthwork protocol while offering the regions flexibility in making project-by-project earthwork decisions.
2018-2. May 17, 2018. This Design Bulletin is the final notification for additional input to Form 463. It is a follow up to Design Bulletin 2018-1 issued on May 2, 2018.
2018-1. May 2, 2018. The FHWA controlling criteria for design, changed from 13 to 10 in mid-2016. Outreach to the regions via the Project Delivery Advisory Committee (PDAC) regarding Form 463 redesign began in early 2017. The new Form 463 currently in SAP production, obtained PDAC approval in February. Please read this bulletin to find more highlights.
2017-01. April 10, 2017. This bulletin aligns Colorado noise standards with national standards.
2016-4. May 13, 2016. CDOT is now able to provide 3D modeling information to Contractors to be used during bidding and construction, provided the project meets specified criteria.
2016-3. March 28, 2016. The description of the duties and function of the Engineering Estimates and Market Analysis Unit has been updated in Section 2.27 of the Project Development Manual with a total rewrite of that section.
2016-02. January 26, 2016. Per a modification to a Colorado Revised Statute, CDOT must notify all parties (via reporting on a website) during the design of the project of any new permanent water detention or filtration facilities intended to be put into service after August 2015.
2016-1. January 21, 2016. Beginning January 1, 2016 all projects with a Design Scoping Review on or after February 1, 2016 will require a Transportation Systems Management and Operations (TSM&O) Evaluation.
2015-10. December 9, 2015. Currently, CDOT Project Managers, Project Engineers, and Project Teams inherently consider project risks throughout the lifecycle of a project. This guidance provides a process and framework to help define and manage risks as well as risk management tools.
2015-09. November 5, 2015. Chapter 14 "Bicycle and Pedestrian Facilities" of the CDOT Roadway Design Guide has been revised.
2015-8. October 9. 2015. To provide consistency and uniformity to the Revision Under Advertisement process, significant details have been added to Section 2.34 of the Project Development Manual. The changes include an example revision request letter and detailed instructions on how to mark up and complete the bid documents, special provisions, and plan sheets associated with a change.
2015-7. Revised on October 9, 2015. In order to not delay going to ad, the PS&E (Plans, Specifications and Estimate) Package for projects of Division Interest (PoDI) must be sent to FHWA two weeks before beginning the Form 1180 process. FHWA now requires that the PS&E package be delivered in paper format.
2015-6. August 17, 2015. Chapter 18 Noise Guide of the CDOT Roadway Design Guide has been revised and expanded to present more detailed information about the materials used in the construction of noise barrier walls.
2014-14. December 8, 2014. This bulletin provides guidance on naming conventions for project-level scopes, schedules and cost estimates in ProjectWise.
2015-5. August 17, 2015. The purpose of this bulletin is to provide direction on tracking Permanent Water Quality (PWQ) project money. A project follows this procedure anytime PWQ Mitigation Pool funds are used (including local agency projects). This bulletin supersedes Design Bulletin 2014-12: Permanent Water Quality Mitigation Pool Combination Projects and Construction Bulletin 2014-6: Permanent Water Quality Mitigation Pool.
2015-4. June 8, 2015. Policy Memo 26 Context Sensitive Solutions (CSS) Vision for CDOT, issued October 31, 2005 has been replaced by a new subsection of Section 8 in the Project Development Manual.
2015-3. May 4, 2015 (Revised on May 29, 2015 with correct the Transport coding). Information on Cut Back and Multiple Schedule Projects.
