A STUDY ON THE INFLUENCE OF YELLOW BAR CARRIAGEWAY MARKINGS ON DRIVER SPEED BEHAVIOUR. PROCEEDINGS, SIXTH CONFERENCE, ROAD ENGINEERING ASSOCIATION OF ASIA AND AUSTRALASIA, 4-10 MARCH 1990, KUALA LUMPUR, VOLUMES 1 TO 5 AND POST CONFERENCE PROCEEDINGS

Driver-speed behaviour on approaching and traversing yellow bar carriageway markings was studied to ascertain the effectiveness of the markings in reducing vehicle speeds. 8 sites throughout Peninsular Malaysia were selected for the study; each site being of different geometric layout and featuring different types of road hazards. With the exception of 2 of the sites, the study was carried out in 3 stages; i.e., when there were no markings at the sites, when there were markings at the sites made with roadline paint and finally, when there were markings at the sites made with thermoplastic material. Spot speed measurements were performed by using "radar guns" at 3 or 4 stations located on the approach to, and at various points along a set of yellow bar carriageway markings. Over 120,000 speed measurements were obtained from a total of 31 stations and the results were analyzed using statistical computer software. Vehicle-speed profiles were plotted from the results obtained and speed-change patterns were observed for mean and 85th percentile speeds. It was found that, on the whole, yellow bar carriageway markings caused a more stable driver speed reduction pattern before reaching a hazard. Carriageway marking made with thermoplastic materials have been found to be more effective than the markings made with normal paint. However, it should not be a substitute to installing regular warning signs or as a compensation for inadequate sight distance because yellow bar carriageway markings are only effective on an approach to a visible hazard such as a junction or a narrow bridge. For the covering entry of the conference see IRRD 823206. (Author/TRRL)

• Corporate Authors:

  Road Engineering Association of Asia & Australasia

  Office of the Director-General of Public Works
  Kuala Lumpur,   Malaysia 
• Authors:
  • Lee, C H
  • Jamalud, Ma Bin Mon
• Publication Date: 1990

Media Info

• Features: References;
• Pagination: 26 p.
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Before and after studies; Conferences; Data analysis; Mathematical analysis; Measures of effectiveness; Road markings; Speed control; Speed measurement; Thermoplastic materials; Traffic paint; Yellow
• Uncontrolled Terms: Effectiveness
• Geographic Terms: Malaysia
• Old TRIS Terms: Traffic marking
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 00620198
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, TRIS
• Created Date: Mar 31 1992 12:00AM