To meet requirements of traffic census, W.R.Sykes Interlocking Signal Co produced compact and readily portable counter which is accurate, in general, to within ± 5%. (See also Engineering v 171 n 4441 Mar 9 1951 p 295)
Vehicle counter for road-traffic census
Engineer
Engineer ; 191 , n 4965
1951
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Vehicle counter for road-traffic census
Engineering Index Backfile | 1951
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