Traffic signals visible only to selected drivers.

Author(s)
-
Year
Abstract

Recently developed traffic signals which channel their beams so as to be visible only to drivers intended to see them, are described and illustrated. The signals can be beamed with an accuracy of ±7. inches at 900 ft. The key element is a flat incremental lens sealed in acrylic. This in combination with a glass element controls what the motorist sees.

Request publication

2 + 17 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

Publication

Library number
A 9879 fo IRRD 49668
Source

'Z. pl. " 1970, 30cm., 3 blz. Overdruk uit: Public Works, 1970, januari, blz. 80 /82.

Our collection

This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.