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Interchange Design

InterchangeInterchange engineers provide guidance regarding:

  • Layouts and designs.
  • Design modifications.
  • Design standards.
  • Layout sheets.
  • Federal Highway Administration modification review process.

Interchange Modification Requests

Roadway Engineering submits formal requests to FHWA regarding modifications or additions to the interstate system.

FHWA Policy on Interchanges

Interchange Modification Requests

Layout Sheets

Interchange Layout Sheets are required for all new or revised interchanges.

Interchange Layout Sheet Guide

Typical Interchange Layout Sheet (drawing file)

Example Layouts

Example Traffic Diagram

Layout Cell Library

Gray Shade Table


Roadway Engineering has developed an Interchange Design class; the content of that training is currently being updated. Once available, a course listing will be posted. Technical support is available by contacting one of the interchange engineers.

Contact the Roadway Engineering Section

4040 Fairview Industrial Drive SE, MS 4
Salem, Oregon 97302
Phone: 503-986-3568
Fax: 503-986-3749

Program Contacts

Phone: 971-986-3756

Phone: 503-986-3560

Resources and Related Content

Highway Design Manual