Chapter 3 - Design Controls

3.4. Traffic Engineering, Capacity, and Level of Service

All portions of roadways that are part of major construction or reconstruction shall be designed to accommodate, at a minimum, 20-year forecasted traffic volumes. The design year for the 20-year traffic volumes shall be forecasted from the estimated construction completion date.

Refer to Chapter 13, Traffic Analysis and Design, of this Manual for further discussion on the traffic engineering and analysis. 

If a project is not new roadway construction or reconstruction, refer to Chapter 11, Other Project Types for guidance relating to other project types.