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The CDOT Roadway Design Guide 2023 establishes a new framework for designing roads, streets, freeways, expressways, and interstates.

Design criteria and design flexibility helps in achieving the most appropriate design.

A road facility type (Road) is generally characterized as a two or more-lane roadway with shoulders and roadside ditches, mainly found in a rural, low-density ...

(Rev: 03-2025) A Street facility type (Street) is generally characterized by the inclusion of curb and gutter, sidewalks, and storm sewers in more dense, urban ...

A Freeway or Interstate is a divided highway with full control of access and two or more through lanes for the exclusive use of traffic in each direction. ...

The design of Roads; Streets; and Freeways, Expressways, and Interstates in differing context classifications are treated differently. However, common to all ...

(Rev: 03-2025) Cross sections will often vary throughout a project length to adapt to different context zones and identified constraints.

(Rev: 03-2025) An intersection is defined as the general area where two or more roadways join or cross, including the roadway and roadside facilities for ...

A roundabout is a form of a circular intersection in which traffic travels counterclockwise around a central island and entering traffic must yield to ...