An Update to AASHTO's Guidelines for Geometric Design of Very Low-Volume Local Roads

The geometric design of facilities designated as low volume presents unique challenges to engineers across the United States. These roadways, designated by low traffic volumes thus reduced frequency of crashes, require the use of design principles unlike those applied to higher volume roads. Accomplishing the design of a low-volume highway - its three-dimensional features (horizontal alignment, vertical alignment and cross-section) and appurtenances to provide for drainage, traffic control and safety, requires a well-defined process. AASHTO initially developed the guidelines for geometric design of very low-volume roads in 1996 and the final product was published in 2001. During the past 11 years, much has changed in the vehicle fleet, knowledge about driver characteristics (i.e., human factors), and safety and operations of these types of facilities. AASHTO policy requires that all reference material be reviewed and analyzed for potential updates. An assessment of the current publication and design process is needed to appropriately leverage and/or reflect recent advances and emerging issues contained in the documents. The objective of this project was to identify needed updates to current design policy, and/or necessary changes in the fundamental design process to incorporate the latest design principles.


  • English


  • Status: Completed
  • Funding: $100000
  • Contract Numbers:

    Project 20-07, Task 343

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Start Date: 20130618
  • Expected Completion Date: 20151214
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01781461
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-07, Task 343
  • Files: TRB, RIP
  • Created Date: Sep 6 2021 3:17PM