Home » lighting » Highway Lighting Part 2

Highway Lighting Part 2

Posted by aditya | 8:06 PM | | 1 comments »

During night driving the manner in which objects are visible varies with both the absolute level of brightness and the relative brightness of the road surface and the object. When the brightness of the object is less than that of the background, that this, when the object appears drker than the road surface, discernment is principally by silhouette. If the brightness, of the pvement is uniformly increased, discernment by silhouette is enhanced. Hence it is obvious that night visibility on concrete and other light coloured pavements are better than on black top surfaces.



picture from www.twincitiesdailyphoto.com



picture from www.rjhaynie.com


The various factors that influence night visibility are:
  • amount and distribution of light flux from the lamps
  • size of object
  • brightness of object
  • brightness of the background
  • reflecting characteristics of the pavement surface
  • glare on the eyes of the driver
  • time available to see an object


Highway and Transport Engineering
and this section is about Highway Lighting
(refference : Khanna, S.K., Justo, C.E.G., Highway Engineering, 3th edition, Nem Chand & Bros Roorkee (U.P.), 1976.)

Bookmark and Share

Title Post: Highway Lighting Part 2
Rating: 100% based on 99998 ratings. 5 user reviews.
Author: aditya