Trade-off analyses in major interchange design. Paper presented at the 52nd Annual Meeting of the Highway Research Board, Washington D.C., January 1973.

Present practices in trade-offs between costs and operational efficiency in the design process for major interchanges are reviewed. A level-of-merit design concept aimed at separating the operational and safety considerations from costs in the decision-making process is described. It is suggested that trade-off analysis cannot be isolated but must be interwoven with the entire design process.