AASHTO VLVLR-1

The Guidelines for Geometric Design of Very Low-Volume Local Roads (ADT less than 400) addresses the unique design issues highway designers and engineers face when determining appropriate and cost-effective geometric design policies for very low-volume local roads. A new approach to geometric design of these types of roads, stemming from research on the safety and cost-effectiveness of geometric elements and site-specific safety conditions, is incorporated into this work. This approach covers both new and existing construction projects. Because geometric design guidance for very low-volume local roads differs from the policies typically applied to higher-volume roads, these guidelines may be used in lieu of A Policy on Geometric Design of Highways and Streets, also known as the "The Green Book." Design values are presented in both metric and U.S. customary units.