TRAFFIC FLOW EXPERIMENTS IN THE QUEENSWAY MERSEY ROAD TUNNEL

THIS ARTICLE IS THE FIRST OF TWO DESCRIBING TRAFFIC FLOW EXPERIMENTS TO ASSESS THE POTENTIAL INCREASES IN CAPACITY WHICH COULD RESULT FROM THE INTRODUCTION OF FLOW CONTROL SCHEMES. REFERENCE IS MADE TO THE WORK CARRIED OUT BY THE STAFF OF THE PORT OF NEW YORK AUTHORITY IN THE HOLLAND AND LINCOLN TUNNELS AND PRELIMINARY EXPERIMENTS TO DERIVE SPEED AND CAPACITY PROFILES IN THE QUEENSWAY TUNNEL ARE DESCRIBED. THIS EARLY WORK ESTABLISHED THE NEED TO DEVELOP AUTOMATIC EQUIPMENT FOR THE COLLECTION OF SPEED HEADWAY DATA AND CONSIDERATION IS GIVEN TO THE USE OF VARIOUS TYPES OF VEHICLE PRESENCE DETECTORS. THIS LED TO THE DEVELOPMENT OF A DATA COLLECTION SYSTEM USING INDUCTION LOOP DETECTORS TAPED TO THE ROAD SURFACE AND LINKED TO A RAIR OF COUNTER-TIMER UNITS WHICH OPERATED IN PARALLEL TO GIVE A PUNCHED TAPE OUTPUT WHICH COULD BE USED TO DETERMINE INDIVIDUAL VEHICLE SPEEDS AND HEADWAY AT VARIOUS OBSERVATION STATIONS IN THE TUNNEL. (A)

• Corporate Authors:

  Traffic Engineering & Control /UK

  ,    
• Authors:
  • Heyes, M P
  • Ashworth, R
• Publication Date: 1973-1

Language

• English

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 124-7
• Serial:
  • Volume: 15 N

Subject/Index Terms

• TRT Terms: Highway capacity; Information processing; Measurement; Sensors; Speed; Traffic flow; Travel patterns; Tunnels; Vehicular tunnels
• Uncontrolled Terms: Traffic patterns
• Old TRIS Terms: Tunnel capacity
• Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00226893
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Jul 16 1974 12:00AM