READING DISTANCES OF RETROREFLECTIVE ROAD SIGNS DURING NIGHT DRIVING

The legibility of 170 mm high road signs carrying a text was investigated during rural night driving. It was shown that reading distances were greatest for texts with effective reflective intensities in the approximate range of 2-10 mcd/lux.cm sq. In order to maintain an acceptable readability of the road signs in use, it was recommended that retroreflective materials used on signs have a reflective intensity above 4 mcd/lux.cm sq. /TRRL/

• Corporate Authors:

  Gothenburg University, Sweden

  Kulturgeografiska Institutionen, Fack
  Gothenburg,   Sweden 
• Authors:
  • SVENSON, O
  • DAHLSTEDT, S
  • Englund, SAJ
• Publication Date: 1976

Media Info

• Features: Figures; References; Tables;
• Pagination: 8 p.
• Serial:
  • Volume: 6
  • Issue Number: 5

Subject/Index Terms

• TRT Terms: Driving; Legibility; Night; Night visibility; Reflectivity; Reflectorized materials; Retroreflection; Tests; Traffic signs; Visibility distance
• Old TRIS Terms: Retrodirective reflection
• ITRD Terms: 1855: Driving (veh); 540: Legibility; 9052: Night; 5926: Reflectivity; 4523: Reflectorized material; 6255: Test; 553: Traffic sign; 6793: Visibility distance
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control;

Filing Info

• Accession Number: 00147912
• Record Type: Publication
• Source Agency: Swedish National Road and Traffic Research Institute
• Report/Paper Numbers: Monog Ser
• Files: ITRD, TRIS
• Created Date: Aug 4 1977 12:00AM