AN ANALYSIS OF DIAMOND INTERCHANGE SIGNALIZATION
P K Munjal · Highway Research Record · 1971
A SYSTEMATIC APPROACH TO THE SIGNALIZATION OF DIAMOND INTERCHANGES IS PRESENTED. ATTENTION IS DIRECTED SO THAT THE RESULTING SIGNALIZATION CONCEPTS ARE APPLICABLE TO THE REAL-TIME CONTROL OF DIAMOND INTERCHANGES, WHICH IS THE ULTIMATE OBJECTIVE OF THIS PROJECT. THIS PAPER PROVIDES A CRITICAL REVIEW OF THE EXISTING PRACTICES FOR DIAMOND INTERCHANGES. ONE OF THE PRINCIPAL PRODUCTS IS THE IDENTIFICATION OF ALL THE BASIC ELEMENTS THAT CONSTITUTE A PHASING PATTERN. EACH OF THE PHASING PATTERNS IS THEN DESCRIBED BY A SET OF PARAMETERS THAT HAVE ONE-TO-ONE CORRESPONDENCE WITH THE SIGNAL-CONTROLLER ADJUSTMENTS. THESE BASIC PHASING PARAMETERS ARE USED AS AIDS TO DEVELOP AND SYNTHESIZE THE VARIOUS POSSIBLE PHASING PATTERNS. AFTER EACH PHASING PATTERN DEVELOPED IS EVALUATED, 2 PREFERRED SETS OF PHASING PATTERNS ARE IDENTIFIED AND A TYPICAL DIAMOND INTERCHANGE PHASING PATTERN FROM THE FIELD IS DESCRIBED. APPLICABILITY OF THESE PHASING CONCEPTS TO THE REAL-TIME CONTROL OF DIAMOND INTERCHANGES IS ALSO DISCUSSED. FINALLY OPERATIONAL CHARACTERISTICS OF FULL DIAMOND INTERCHANGES FROM SIGNALIZATION DATA AVAILABLE FOR THE CITY OF LOS ANGELES ARE PRESENTED. /AUTHOR/