M Standard Plans & Other Resources

Download the CDOT M Standard Plans book, individual plan sheets, revision lists, and CAD files for roadway design projects. View current technical standards, update notices, and transition guidelines for the digital-only 2026 M Standard Plans release.

Please note that CDOT M Standards and S Standards are now separate documents, you can find a link to the current S Standard Plans in the Other Resources section below. The CDOT M Standard Plans book is available exclusively online and is no longer printed or sold in physical format.

2026 M Standard Plans Book & Plans List

The 2026 M Standard Plans book is now available. Its use is optional through August 2026 and becomes mandatory starting September 1, 2026.

Download the 2026 M Standards Book

The M Standard Plans List must be inserted into all Design Plan Sets. Use the checkboxes to designate which new or revised M Standards apply to the project.

Download the 11x17 Sheet (DGN) Download the 11x17 Sheet (PDF)

An 8.5"x11" sheet is also available. Include this page in your plan set to designate which new or revised M Standards apply to the project.

Download the 8.5x11 Sheet (DGN) Download the 8.5x11 Sheet (PDF)

2019 M Standard Plans Book, Plans List, & Addenda

The 2019 version of the M Standards is available for projects that are bid prior to September 1, 2026 and must not be used for projects after that date.

Download the 2019 M Standards Book Access the 2019 M Standard Plans by Section

The 2019 M Standard Plans List (issued on 1/16/2026) must be inserted into the Design Plans set. It is used to show which new or revised M Standard Plan Sheet will be used by filling in the Standard's corresponding checkbox.

Download the 11x17 Sheet (DGN) Download the 11x17 Sheet (PDF)

Download the 8.5x11 Sheet (DGN) Download the 8.5x11 Sheet (PDF)

The Addenda for the 2019 M Standard Plans was issued on April 25, 2025.

Download the 2019 M Standards Addenda

Other Resources

2025 Construction Specifications (Version 1)
S Standard Plans - Access S Standard Plans, downloadable CAD, and PDF design files for traffic safety infrastructure including signage, signals, pavement markings, lighting, and temporary work zone controls.
CDOT Form 1300 - Submittal of New or Revised M Standard Plan or Project Detail.
Frequently Asked Questions (FAQ) about CDOT Guardrails, Crash Cushions, and End Treatments
Procedural Directive 513.2 - Effective June 2025, Procedural Directive 513.2 Construction Project Standard Plans (M & S Standards) outlines the official processes and responsibilities for developing, revising, and implementing Standard Plans used on CDOT construction projects.
CDOT Library - Established in 1949, the CDOT Library provides CDOT employees, engineers, and researchers with transportation-related resources and information. The collection is a combination of both print and electronic resources including technical reports, journals, books, and databases.
FHWA Hardware Eligibility Letters - Access the FHWA's official database of Federal-aid reimbursement eligibility letters to verify crash-tested roadside safety devices such as barriers, sign supports, and work zone hardware for state project use.
The Specifications & M Standards Unit Annual Event Calendar - This calendar tracks projects milestones, key dates, events, and deadlines for the Specifications and M Standards Unit.

If you are a CDOT employee, consultant, or contractor and would like to receive emails of the latest updates and revisions, please email [email protected]. Include your name, company name, and the email address that you would like to receive this information.