Interchange 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
Training
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.