Section 5: Interchange Applications

Introduction

In some situations, signing for a conventional highway is located at grade-separated interchanges or the ramps and frontage roads of freeways. This section addresses the unique signing applications of these situations.

Interchanges

Signing situations for grade-separated interchange off-ramps, on-ramps, gore areas, and streets approaching the interchange are illustrated in Figures 7-16 through 7-18.
The figures presented are intended to show guide signing and regulatory signing principles to prevent wrong way driving. Not all approach and departure signing is shown based on space limitations and chapters 5 and 6 in this manual should be consulted for placement of these signs.

Frontage Roads

Frontage road signing issues for both the one-way and two-way frontage roads and their on- and off-ramps are addressed in this subsection. Figures 7-19 through 7-21 illustrate the placement of the signing on the frontage road and the intersection of the frontage road or ramp with a conventional highway.
Diamond Interchange with No Frontage Roads (click in image to see full-size image)
Figure 7-16. Diamond Interchange with No Frontage Roads
Diamond Interchange with One-Way FrontageRoads (click in image to see full-size image)
Figure 7-17. Diamond Interchange with One-Way Frontage Roads
Diamond Interchange with Two-Way FrontageRoads (click in image to see full-size image)
Figure 7-18. Diamond Interchange with Two-Way Frontage Roads
One-Way Frontage Road Intersection AreaDetail (click in image to see full-size image)
Figure 7-19. One-Way Frontage Road Intersection Area Detail
One-Way Frontage Road with Exit Ramp, Two-LaneApproach, Stop Control (click in image to see full-size image)
Figure 7-20. One-Way Frontage Road with Exit Ramp, Two-Lane Approach, Stop Control
Two-Way Frontage Road with Exit Ramp, One-LaneApproach, Stop Control (click in image to see full-size image)
Figure 7-21. Two-Way Frontage Road with Exit Ramp, One-Lane Approach, Stop Control