REAL-TIME CONTROL SYSTEM FOR DIAMOND INTERCHANGES

THIS COMPREHENSIVE EFFORT ON DIAMOND INTERCHANGE RESEARCH BEGAN IN 1966. INITIALLY, RESEARCH WAS AIMED AT DEVELOPMENT OF A VALIDATED SIMULATION MODEL FOR USE IN STUDYING GEOMETRIC AND FIXED TIME CONTROL ASPECTS OF DIAMOND INTERCHANGES AND THEIR ADJACENT FREEWAY SECTIONS. AT THE COMPLETION OF THIS RESEARCH, DECISIONS WERE MADE TO ENLARGE THE SIMULATION MODEL TO INCLUDE THE NEARBY STREET INTERSECTIONS AND TO EXTEND CONTROL RESEARCH INTO DEVELOPMENT OF COMPUTERIZED REAL-TIME CONTROL. THESE DECISIONS WERE MADE IN CONCERT WITH THE CALIFORNIA DIVISION OF HIGHWAYS AND THE CITY OF LOS ANGELES, BOTH OF WHICH CONTRIBUTED SIGNIFICANTLY TO THE PROGRESS OF THE PROJECT. THIS BROCHURE DECRIBES THE DEVELOPMENT AND TESTING OF THE REAL-TIME SYSTEM WHICH EVOLVED THROUGH SIMULATION ANALYSIS OF REAL-TIME CONTROL USING A SERIES OF CANDIDATE CONTROL ALGORITHMS, CONSTRUCTION OF A COMPUTERIZED SYSTEM AT THE WESTERN AVENUE--SANTA MONICA FREEWAY INTERCHANGE IN LOS ANGELES, AND FIELD TESTING OF THE ALGORITHM WHICH BEST MINIMIZED AVERAGE VEHICLE DELAY. TEST RESULTS INDICATED THAT THE CONTROL SYSTEM CAN PRODUCE A 20-30 PERCENT REDUCTION IN BOTH DELAY AND STOPS FOR MOTORISTS USING THE DIAMOND INTERCHANGE COMPLEX.

• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Publication Date: 1973-12

Media Info

• Features: Figures; References;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Algorithms; Diamond interchanges; Field tests; Information processing; Interchanges; Mathematical models; Real time control; Simulation; Traffic control; Traffic delays
• Uncontrolled Terms: Models
• Old TRIS Terms: Real-time systems; Traffic control systems
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226877
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Jun 5 1974 12:00AM