SIGHT DISTANCE CRITERIA FOR ROAD DESIGN AND ROADSIDE INFORMATION

ZICHTCRITERIA VOOR WEGEN EN INFORMATIEDRAGERS LANGS DE WEG

A literature survey is made with regard to terms and criteria that are used for the measurement and assessment of sight distances on the road. The existing terminology is rather confusing and it is recommended therefore to use the word "sight distance" as a unique term for the measurable, available sight. With respect to the required sight distances it is proposed to use the additional word "criterion", like stopping sight distance criterion, that is to say the sight distance required for safe stopping. With respect to the knowledge underlying the different sight distance criteria, it is concluded that the passing sight distance criterion is presently quite well motivated. The decelaration levels used as an element of the stopping sight distance criterion are considered to be considerably larger than those normally accepted by drivers. Furthermore, the perception- reaction time value of 1.5 or 2 seconds for rural roads is considered too low. Most of the criteria lack a fundamental knowledge about the relation between sight distance and actual speed choice.

• Corporate Authors:

  TNO - TECHNISCHE MENSKUNDE

  P.O. BOX 23
  SOESTERBERG,   Netherlands  3769 DE
• Authors:
  • Godthelp, J
  • Tenkink, E
• Publication Date: 1990

Language

• Dutch

Media Info

• Features: References;
• Pagination: 32 p.
• Serial:
  • Issue Number: IZF C-10

Subject/Index Terms

• TRT Terms: Aptitude; Braking performance; Decision making; Dictionaries; Driver information systems; Drivers; Driving; Highway design; Layout; Measurement; Motor reactions; Passing; Perception; Speed; Vehicle spacing; Visibility distance
• Uncontrolled Terms: Modifications
• ITRD Terms: 1695: Braking distance; 2248: Decision process; 8596: Dictionary; 2226: Driving aptitude; 2855: Highway design; 2885: Layout; 6136: Measurement; 9048: Modification; 1822: Overtaking; 2229: Perception; 2247: Reaction (human); 5408: Speed; 694: Vehicle spacing; 6793: Visibility distance
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00712320
• Record Type: Publication
• Source Agency: Institute for Road Safety Research, SWOV
• Files: ITRD
• Created Date: Oct 24 1995 12:00AM