These guidelines do not establish ramp and interchange spacing standards. Rather they provide a process and criteria for assessing spacing in a given context to assist planners and designers in considering the feasibility of new or rebuilt interchanges and ramps. Interchange spacing is defined as the distance between the centerlines of successive crossroads with interchanges on a freeway.
Documents in the Category: Interchange
Rakha, H., A. Flintsch, M. Arafeh, G. Abdel-Salam, D. Dua and M. Abbas, Access Control Design on Highway Interchanges, Virginia Polytechnic Institute and State University, Blacksburg, Virginia Department of Transportation, Virginia Transportation Research Council (2008)
This project applied analytical tools (regional economic forecasting models, GIS, transportation planning software, and traffic simulation software) to inform the planning and development process along an emerging interstate highway corridor. It illustrated the benefits of advanced planning and access management intended to preserve the functional integrity of the corridor and its interchanges and crossroads.
Butorac, M., and J. Wen, NCHRP Synthesis 332: Access Management on Crossroads in the Vicinity of Interchanges, Transportation Research Board of the National Academies, Washington, D.C. (2004)
This study documented practices and standards relative to access location and design on the crossroads in the vicinity of interchanges, both for new interchanges and retrofit of existing interchanges. It provides guidance relative to factors that may be considered when assessing crossroad and mainline spacing near interchanges.
Anderson, M., L. Severin, S. Jones Jr., S. Ostaseski and M. Lewandowski, GIS Forecast of Potential Interchange Land Use Patterns to Support Access Management, Transportation Research Board 86th Annual Meeting (2007)
TRBs National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts.