Idea Project Final Report, Distributed Input/ Output Subsystem For Traffic Signal Control

Details

• Subject/TRT Terms:
  • RESEARCH AND DEVELOPMENT OR R&D
  • TRAFFIC SIGNAL PRIORITY/PREEMPTION
  • TRAFFIC SIGNAL CONTROL
  • ADVANCED TRAFFIC MANAGEMENT SYSTEMS OR ATMS
  • INTELLIGENT VEHICLE INITIATIVE OR IVI
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Joint Program Office for Intelligent Transportation Systems
• Abstract:
  IN AN EFFORT TO ADD MORE AND MORE FEATURES (PREEMPTION, MALFUNCTION MANAGEMENT, WEATHER MONITORING, AND DYNAMIC LANE ASSIGNMENT, AMONG OTHERS) TO TRAFFIC SIGNAL SYSTEMS, THE TRAFFIC SIGNAL CABINET HAS BECOME VERY ; COMPLICATED (FIGURE 1). FURTHERMORE, NONE OF THE STANDARD FAMILY OF TRAFLIC SIGNAL CONTROLLERS (NEMA, 170, 179, AUD ATMS 2070) HAVE INTERFACES MORE SOPHISTICATED THAN 24-VOLT INPUT/OUTPUT LOGIC. IN FALL 1993, A PROPOSAL ; WAS SUBMITTED TO THE TRANSPORTATION RESEARCH BOARD (TRB) INTELLIGENT TRANSPORTATION SYSTEMS (ITS) IDEAS DESERVING EXPLORATORY ANALYSIS (IDEA) PROGRAM TO DEVELOP A DISTRIBUTED INPUT/OUTPUT SUBSYSTEM FOR THIS NEW ; CONTROLLER. THAT PROPOSAL DESCRIBED A "DRIVE BY WIRE" DISTRIBUTED CONTROL TECHNOLOGY FOR ELECTRICALLY INTERFACING THE ATMS 2070 TO SENSORS (LOOP DETECTORS) AND ACTUATORS (SIGNAL LAMPS). THE UNIQUE AND NOVEL CHARACTERISTIC OF THIS PROPOSED MODEL WAS THAT ONLY TWO ALTERNATING CURRENT (110VAC) CONDUCTORS WERE REQUIRED TO BE CONNECTED INSTEAD OF THE 100 CONDUCTORS USUALLY CONNECTED TO A NEMA OR 170 CONTROLLER (FIGURE 2). THIS NOVEL INTERFACE WOULD GREATLY REDUCE THE QUANTITY OF WIRING INSTALLED AT TRAFFIC SIGNALS. AGENCIES WOULD SAVE MONEY BY REDUCING LABOR AND MATERIAL COSTS. FURTHERMORE, THIS DISTRIBUTED CONTROL MODEL COULD BE EASILY EXPANDED TO ; ACCOMMODATE ADDITIONAL SENSORS AND ACTUATORS.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/2300/dot_2300_DS1.pdf
• File Type:
  [PDF - 1.21 MB]
• Collection(s):
  ITSJPO Digital Library
• Main Document Checksum:
  urn:sha-512:dd95aadfe72725e39cbd5b6ae544a16e228d36fb576b4bd19d2212488c68864bf5fe31b3400558a685cb22f63bb9fd0fb071f00d6d34ea5976970c9588cd323b