10.1.4 Minimum Geometric Design Values

Minimum 3R geometric design guidelines for roadways and frontage roads are provided in Appendix A and Appendix B.
A
design exception
 is required for not meeting the minimum values shown in Appendix A tables. A
design waiver
 is required for not meeting the minimum values shown in Appendix B tables. See
Section 10.1.5.1
with respect to vertical and horizontal alignment.
Criteria is designated as applicable to high-volume roadways, low-volume roadways, or both. A Benefit cost evaluation should serve as the basis for design exceptions and design waivers
 (see
Section 10.1.1
).