INFORMATION AT INTERSECTIONS. IV. STUDIES OF THE BEHAVIOUR OF DRIVERS AND INTENSIFIED STUDIES OF THE SCENES OF TRAFFIC ACCIDENTS AT SIGNAL-CONTROLLED INTERSECTIONS, GOTHENBURG1973

INFORMATIONSINHAEMTNING I KORSNINGAR IV. STUDIER AV FOERARBETEENDEN SAMT INTENSIFIERADE OLYCKSPLATSUNDERSOEKNINGAR I SIGNALREGLERADE KORSNINGAR GOETEBORG 1970

A RESEARCH PROJECT WAS STARTED IN GOTHENBURG 1970 WITH THE AIM OF STUDYING THE EFFECTS OF POLICE SUPERVISION AT SIGNAL- CONTROLLED INTERSECTIONS. INTENSIFIED STUDIES OF THE SCENES OF TRAFFIC ACCIDENTS WERE ALSO CARRIED OUT. MEASUREMENTS WERE MADE OF AVERAGE SPEEDS AND FREQUENCIES OF SPEED INCREASES AT CERTAIN DISTANCES BEFORE THE SIGNALS IN ORDER TO ESTABLISH A CHANGE TO A MORE DEFENSIVE STYLE OF DRIVING. A MATHEMATICAL FUNCTION DESCRIBING THE BRAKING SEQUENCE WAS DERIVED AND TESTED IN FIELD TRIALS. DATA COLLECTION WAS CARRIED OUT WITH TIME-LAPSE FILMING EQUIPMENT. THE RESULTS SHOW THAT THE STYLE OF DRIVING BECOMES MORE DEFENSIVE DURING PERIODS OF POLICE SUPERVISION. THERE WAS A DROP IN AVERAGE SPEEDS 35 METRES BEFORE THE STOP LINE AND THE DRIVING AGAINST RED DROPPED FROM 23,0 PERCENT TO 9,2 PERCENT OF THOSE VEHICLES WHICH ARE 40 TO 100 METRES FROM THE STOP LINE WHEN THE LIGHTS CHANGE TO GREEN-AMBER. AS FOR THE ACCIDENT STUDY, THE LARGEST ACCIDENT GROUP INDICATED THAT ROAD USERS HAD NOT BEEN AWARE OF SIGNALS OR OF THE RED SIGNAL PHASE (23% OF THE ACCIDENTS). FROM THE INVESTIGATION IT IS EVIDENT THAT BEHAVIOUR VARIATIONS CONDITIONED BY THE DESIGN OF THE INTERSECTION ARE GREATER THAN THOSE CONDITIONED BY POLICE SUPERVISION.

• Corporate Authors:

  Goeteborg City of, Sweden

  S-402 20 Goeteborg 5,   Sweden 
• Authors:
  • GUNNARSSON, S O
  • JOHANSSON, B
  • Lundgren, O
• Publication Date: 1972

Language

• Swedish

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 122 p.

Subject/Index Terms

• TRT Terms: Approach lanes; Behavior; Braking; Crash analysis; Crashes; Defensive drivers; Drivers; Intersections; Mathematical models; Perception; Photography; Police; Signalized intersections; Speed; Supervision; Time; Time lapse photography; Traffic control; Traffic crashes; Traffic signals
• Geographic Terms: Sweden
• Old TRIS Terms: Intersection approach
• ITRD Terms: 1643: Accident; 9001: Behaviour; 1874: Braking; 1772: Driver; 455: Junction; 6473: Mathematical model; 2229: Perception; 6751: Photography; 1522: Police; 5408: Speed; 8109: Sweden; 5414: Time; 654: Traffic control; 565: Traffic signal
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; Security and Emergencies; I73: Traffic Control; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 00080501
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: No. 52 R&D Rpt.
• Files: ITRD, TRIS
• Created Date: Mar 26 1975 12:00AM