Traffic Assets Engineering

Traffic Assets Engineering




Photo by Shane Chevalier, CDOT R1

Traffic Standards | Traffic Special Provisions | Work Zone Safety & Traffic Operations | Signing

Traffic Manuals and Guidelines | Example Tabulations, General Notes & WorksheetsEvents

Other Important Links: Approved Products ListMemorial Sign Program

Our purpose is to provide highway, work zone safety, and traffic operations-related input for transportation planning and project development; provide traffic engineering support; develop and maintain traffic engineering specifications, standards, and related publications; administer statewide policies on guide signing practices and procedures, as well as those governing pavement marking practices; develop and maintain the centralized library of CDOT sign layout templates; evaluate and approve traffic control devices for the CDOT Approved Products List; and administer the CDOT Flagger Program.

Traffic Standards

The Safety Standard Plans are details used in the design and construction of CDOT projects. They contain standardized details for common safety items such as delineators, signs, sign supports, traffic signals and accessories, pavement markings, and traffic controls. The latest published version of the M&S Standard Plans is dated July 4, 2012. Electronic files for the 2012 S-Standard Plans are available in English units only. Please visit the M-Standards page for common items relating to guardrail, box culverts, roadway super-elevation, lighting, and pavement.

CDOT doens't have staff to provide technical support to those outside agencies that use the posted CADD files. For this reason, all potential users of these files must read the following disclaimer and accept its terms, as a prerequisite, to the use the files.

The Colorado Department of Transportation (CDOT) makes these documents available on an "as is basis".  All warranties and representations of any kind with regard to said documents are disclaimed, including the implied warranties of merchantability and fitness for a particular use.  Under no circumstances will CDOT, or any of its officers or employees be liable for any consequential, incident, special or exemplary damages even if appraised of the likelihood of such damages occurring.  CDOT does not warrant the documents against deficiencies of any kind.  The use of any of these documents for work which in under contract with the DOT, does not relieve the contractor from any obligations assumed by the contract, or from complete and proper fulfillment of the terms of the contract, nor does it entitle the contractor to compensation for damages or loss which could be attributed to such use.

Standard Number CDOT Safety Standard Plan Revision Date

Number of Sheets

S-612-1 Typical Delineator Installation 4/12/2018


S-614-1 Typical Ground Sign Placement 12/12/2014


S-614-2 Class I Ground Sign Installation 6/24/2016


S-614-3 Class II Ground Sign Installation


S-614-4 Class III Signs Installation and Details 12/17/2014


S-614-5 Break-Away Sign Support Details for Ground Signs 2/8/2017


S-614-6 Concrete Footings & Sign Island Details for Class III Signs 9/16/2013


S-614-8 Tubular Steel Sign Support Details 4/12/2018


S-614-9 Pedestrian Push Button Post Assembly 5/24/2016


S-614-10 Typical Marker Assembly Installations


S-614-11 Milepost Sign Detail for High Snow Areas


S-614-12 Structure Number Installation 4/30/2018


S-614-14 Flashing Beacon (Permanent) and Sign Installation


S-614-20 Typical Pole Mount Sign Installation


S-614-21 Concrete Barrier Sign Post Installation 5/24/2016


S-614-22 Multi-Sign Installations


S-614-40 Typical Traffic Signal: 30'-75' Double Mast Arms & 65'-75- Single Mast Arms 6/17/2016


S-614-40A Alternate Traffic Signal: 25'-55' Single Mast Arms 6/17/2016


S-614-41 Temporary Span Wire Signals 4/2/2015


S-614-42 Cabinet Foundation Detail


S-614-43 Traffic Loop and Miscellaneous Signal Details


S-614-44 Pedestal Pole Signals 6/17/2016


S-614-50 Overhead Sign Structures (Monotube) 6/17/2016


S-614-60 Dynamic Sign Monotube Structures 6/17/2016


S-627-1 Typical Pavement Markings 2/8/2017


S-630-1 Traffic Controls for Highway Construction 6/23/2016


S-630-2 Barricades, Drums, Concrete Barriers (Temp), and Vertical Panels 6/23/2016


S-630-3 Flashing Beacon (Portable) Details


S-630-4 Steel Sign Support (Temporary) Installation Details


S-630-5 Portable Rumble Strips (Temporary) 8/12/2015


S-630-6 Emergency Pull-Off Area (Temporary)


S-630-7 Rolling Roadblocks for Traffic Control


Swipe table to see more content
  • ARRA Sign Installation
  • ARRA Sign Layout
  • Control Cabinet Leveling on Slope
  • Coordination Unit Installation
  • Delineation Strip Installation
  • FASTER Sign Layout
  • Non-Invasive Micro-Detection
  • Pull Box (Special)
  • Ramp Metering - WMVDS & MWVD
  • School Zone Signing
  • Signal Luminaire Power Source
    • For signals maintained by CDOT with luminaires outside of city limits
  • Signal Luminaire Power Source
    • For signals maintained by CDOT with luminaires within city limits
  • Signal Pole Bonding & Grounding
    • For signals with mast arms
  • Signal Pole Bonding & Grounding
    • For signals with span wire
  • Temporary Barrier Application

Full Closure Strategies Analysis Report

Full Closure Strategies Analysis Report

Full Closure Strategies Analysis Report

Full Closure Strategies Analysis Report

Traffic Special Provisions

Link to 2011 & 2017 Standard Specifications for Road and Bridge Construction

Work Zone Safety and Traffic Operations

National Work Zone Safety Information Clearinghouse


Potential Flaggers must attend a Flagger Certification Class, please contact a Certified Entity (contact links provided below) in order to schedule a class time.

Certified Local Entity                   Certified Private Entity

  • 2018 Flagger Video (CDOT) - This video is to be used in conjunction with the Flagger Training Manual and Flagger Certification Class
  • 2012 Flagger Training Manual (Revised December 2012) - Please use this manual in conjunction with the Flagger Video as study material for the Flagger Certification Class
  • 2012 Flagger Reference Guide - This guide is for the use of Certified Flaggers for use in the field

* Flagger Certifications are valid for two (2) years, it is the flaggers responsibility to re-certify by attending a Flagger Certification Class 


Entities & Proctors

Certified Entities must be registered with the Colorado Secretary of State.  Submittal of the Flagger Training Application along with a current Flagger Certification or a current Traffic Control Supervisor Certification is required.

  • Flagger Training Application - This application must be submitted for all first time or renewal entities desiring certification
  • Annual Quality Assurance Documentation (October 2015) - Certified Entities must submit this documentation on a yearly basis a recommended 45 days prior to their expiration anniversary.  This document must be mailed to the Flagger Program Coordinator in hard copy format as original signatures are required.  If submittal of the Flagger Training Application and Annual Quality Assurance Documentation falls on the same year, please send the two (2) documents separately.
  • Proctor Addition/Deletion Form - Use this form only if your entity is already certified with CDOT.  Entities are required to keep an up-to-date list of all proctors. 

Potential Proctors must be trained and certified by a CDOT approved Certified Entity which is external to the proctor's entity.  This is referred to as "training the trainer" and must operate externally.  Once a proctor is trained and certified, that proctor may then train and certify their in-house employees who would like to become flaggers as well as other external customers such as temporaries, non-employees, and others





Certification cards are the sole property of CDOT and are not to be duplicated or used as a template.  This is grounds for revocation.  If your entity is in need of more certification cards, please contact the Flagger Coordinator.

All certification cards issued to flaggers are valid until the noted expiration date on the card - even if the flagger is no longer working with or for the issuing entity.  The card is transferable between entities and must be recognized as valid.

Travel Demand / Management

Speed Enforcement

This memo will serve as delegation of authority to establish temporary speed limits to the Region Traffic Engineers

White paper summary of C.R.S. reference, Chief Engineer's Memo, and Standard Plan S-630-1

Colorado State Statute pertaining to Double Fines

CDOT Standard for Fines Double

Safe and Effective Use of Law Enforcement Personnel in Work Zones - In-Class Training - This training is required of all law enforcement officers participating in work zone patrols and is available through the agency you work for.

Refresher Course - Safe and Effective Use of Law Enforcement Personnel in Work Zones - Web Based Training - This training is required of all law enforcement every three (3) years after completion of the in-class training.

Instructor Addition/Deletion Form - Use this form if you are an instructor for your agency.  Agencies are required to keep an up-to-date list of all instructors and are allowed only two (2) instructors per agency, one (1) of whom is designated to sign the certification cards.

Please contact [email protected] for any information not described above

Work Zone Safety Guidelines (Flip Book)

Work Zone Safety App (ATSSA)

Work Zone Best Practices 2007

Work Zone Operations Best Practices (FHWA)

Traffic Incident Management Guidelines 2008

Work Zone Positive Protection

Use of Work Zone Clear Zones, Buffer Space, and Positive Protection Deflection Distance Guidance

Field Guide for the Use and Placement of Shadow Vehicles in Work Zones

Field Guide on Removal of TTC (ATTSA)

Applying ADA in Work Zones: A Practitioners Guide

Traffic Management Plan Examples (FHWA)


Colorado Supplement to the MUTCD's Standard Highway Signs

Colorado Special Signing Cases

School Zone Signing
Wildlife Zone Signing

Colorado Guide Sign Examples

Traffic Manuals and Guidelines

Upcoming Traffic & Safety Engineering Branch Events

Contact Us
  • Traffic & Safety
    2829 W. Howard Pl.
    Denver, CO 80204
    Fax: 303-757-9219
  • List of Contacts
Mission & Vision
  • Our mission is to strategically reduce traffic crashes and resulting deaths, injuries, and property damage, and improve the flow of traffic via traffic engineering principles.

  • Our vision is to become the state agency sought-out leader for applying traffic engineering principles to improve traffic safety and maximize the operations of the highway system, and the foremost resource for crash data, analysis, and engineering strategies - and mitigation for improving highway safety and operational efficiency.
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