Welcome to the Flagger Webpage!

New, and Exciting changes are happening to the Flagger Program.   C.R.S. 43-5-308 (2)(b)

The purpose of The Flagger Program is to provide certification to entities through out the state of CO. to train individuals to become flaggers.  Flaggers are part of the line of defense between the traveling public and individuals working in Work Zones.  They provide safety to all involved parties.  The Safety and Traffic Engineering Branch has been monitoring the program since 9/2012.  We are thankful for your cooperation as we were able to roll out this program to meet the standard of care we believe exists at CDOT.

The most updated information will be communicated on the page rather than on the links.  If there is a discrepancy and it is not clear, please contact us.


QUALITY ASSURANCE RELEASE 10/1/2015 is finally here!!

The CDOT examinations for individuals and proctors are to be CLOSED BOOK EXAMS! No Exceptions. In order to qualify as a Traffic Control Supervisor within the state of Co., a person must have 2000 verifiable hours  of OJT in the field.  This does not have to be solely as a flagger.

Frequently Asked Questions    Links to the application, proctor form, manual, and reference guide are below.   Federal Labor Acts

Certified Entity Information is available. Contact the branch as we are updating this document. It will be posted shortly. If for some reason, the links are not working, please be aware that this website is updated often. Please continue and try again.

Entities contacting the branch; It is helpful to know the expiration month. This assures we will be able to find your file quicker.


For Entites:

Use this link to apply for Flagger Training Certification. Email or mail originals. 1st time applications must be accompanied with the proctor's Flagger or TCS card.  All Flagger Certifying Entities are to be using this application.  Re-apply for certification a minimum of forty five (45) days prior to current expiration.

As of August 1, 2014, all proctors need to be certified as Flaggers before training an individualAll 1st time applications submitted, must be accompanied with proof of proctor's having been trained. If an application is received without proctor certification, it will not be considered. 

Proctor Addition/Deletion Form: If your Entity has a current application on file with CDOT, please use this form to highlight a change to your proctors, either adding or deleting.

To obtain testing materials, your Entity must be on file, with current certification.  Proctors and Individuals need to pass with at least an 85%.  This is a closed book exam!

Contact the branch if you are in need of updated flagger cards. We are no longer using any version besides 10/2014.

For Individuals and Entities:

2012 Flagger Training Manual:  This manual has been updated as of December 2012. You may print from this link. To order bound manuals, please call the CDOT Printing and Visual Communications Center at 303-757-9313. They are located at 4201 E. Arkansas Ave. Denver, CO. 80222 South East Bldg.

2012 Flagger Reference Guide: This reference guide has been updated as of December 2012. This is intended for current certified flaggers on projects, and is not intended as training material.

Flagger Video: We are currently in the process of updating our Co. Flagger Video. Please stay tuned as we finalize this process. If your entity chooses to use a video, only Vermont and Virginia have been accepted. The links are attached as well as they are available on youtube.

[email protected] Please use this email for any questions, concerns, or for more information. If you are having problems with this link, please copy and paste it into your browser.


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, contact the branch. 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. 

Flagger Contacts

Safety & Traffic Engineering Branch
4201 East Arkansas Avenue
3rd Floor
Denver, Colorado 80222
303.757.9219 (Fax)

Colorado: The Official State Web Portal