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 Engineer v 191 n 4965 Mar 23 1951 p 394)
Vehicle counter for road-traffic census
Engineering
Engineering ; 171 , n 4441
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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