Traffic Operations & Technology

Colorado Model Traffic Code

Through the cooperative efforts of both state and local governments the “Model Traffic Code”, has been developed to make available a specimen set of uniform motor vehicle and traffic regulations that track state law.  Local governments that adopt the Code by reference are cautioned not to make any changes or additions which are in conflict with state law. However, the adopting local governments are at liberty to delete any parts, articles, or sections which are deemed to be inapplicable.

Download the 2020 Model Traffic Code for Colorado

Flagger Program

CDOT is always striving to improve work zone safety. The safe and effective use of flaggers plays a vital role in protecting the traveling public and workers from the dangers and hazards that are present on roadway construction and maintenance projects. The purpose of the Flagger Program, in accordance with C.R.S. 43-5-308(2)(b), is to provide standardize training and certification to all persons flagging in State of Colorado.

Learn more about CDOT's Flagger Program 

Traffic Control Supervisor Program

The Traffic Control Supervisor (TCS) is responsible for designing, setting up, and maintaining temporary traffic control in a work zone.  Per CDOT Specification 630.11, the Traffic Control Supervisor shall be certified as a worksite traffic supervisor by an authorized entity and shall have a current flagger certification from an authorized entity.

Learn more about the Traffic Control Supervisor Program 

Field Regulatory Operations

We perform the following field studies:

  • School studies for schools adjacent to state highways to determine if school zones and/or school signage are warranted,
  • Speed studies on state highways, typically after reconstruction or new development having impacts  on the highway, to determine proper speed limits, and
  • Speed studies on curves of state highways to determine safe speeds.

School studies may be requested by schools and local government agencies and speed studies may be requested by local government agencies. Please work with your local CDOT Regional Traffic Engineer.

Download the brochure for Setting Realistic Colorado Speed Limits

Managed Lane Guidelines

CDOT has established statewide guidelines for the evaluation of Managed Lanes. “Managed lanes” are defined as highway facilities or a set of lanes where operational strategies are proactively implemented and managed in response to changing conditions. The guidelines were developed in support Policy Directive 1603.0 which requires managed lanes to be strongly considered during the planning and development of capacity improvements on state highway facilities.  Within the guidelines, an evaluation level tool is provided to identify the appropriate level of analyses in a documented and consistent manner. A toolbox of managed lane strategies and performance measure targets are also provided to aid the planning and decision-making process.

Traffic Forecasting

CDOT has established guidelines to assist in the completion of traffic analysis and forecasting procedures on the State Highway System.  The guidelines provide for consistent analyses statewide and were developed through an examination of Colorado's lessons learned and best practices, state-of-practice reviews across the Country, and existing FHWA resources. The guidelines provide guidance for key topics such as measures of effectiveness, data collection, scoping, tool selection, and specific forecasting and analysis methodologies. The guidelines will serve as a living document which evolves with the state of practice and CDOT's needs.

Download the Traffic Analysis and Forecasting Guidelines

Variable Speed Limits

Variable Speed Limits (VSLs) are speed limits that change based on road, traffic, and weather conditions to better reflect a safe traveling speed. Demonstrated applications and benefits of variable speed limits include:

  • Operational - Smoother traffic flow and less delay by proactively managing speed.
  • Work Zone - Reduced speed so that vehicles approaching construction areas and passing through work zones are at safer speeds.
  • Inclement Weather (CDOT Priority) - Improve safety by decreasing risks associated with traveling at speeds too high for the conditions.

Download the Variable Speed Limit Summary

Traffic Signal and Ramp Metering Program

The Traffic Signal and Ramp Metering program is focused on implementing new and innovative technology, including CV and AV applications, deploying and integrating statewide ITS systems, incorporating automated performance measures, and extending technical resources to CDOT regions in the area of traffic signal and ramp metering. Our program objectives are to:

  • Develop statewide policies, procedures, life-cycle asset management, integration, and operation of traffic signal and ramp meters;
  • Manage various statewide funding programs and pools; and
  • Facilitate informed decision-making on project prioritization.

Learn more about the Traffic Signal and Ramp Metering Program