THE PCA METER, AN INSTRUMENT FOR SURVEYING THE SERVICEABILITY OF ROADS, APPLIED IN SWEDEN

PCA-MAETAREN. INSTRUMENT FOER INVENTERING AV VAEGARS KOERBARHET

This report deals with tests on the pca meter, based on measurement of the relative motion between the rear axle and body of a car. Each contact between a sensor and one of A set of lamellae is registered on electromechanical counters. Simple arithmetical treatment of the reading on each counter gives the sum of the squares of the axle/body displacements. This has been compared with the slope variance recorded by the chloe meter, and a strong correlation found. Many agencies in north America are therefore replacing the chloe by the pca meter. A pca meter built by the swedish road and traffic research institute has been installed in a volvo 145 station waggon, tested on several road sections and found to compare favourably with the chloe meter. Since the car containing the pca meter is driven at the speed of other traffic, its measuring capacity is much higher than that of chloe; it is estimated that one pca per county is sufficient to survey all roads once a year. The cost of the meter installed in a car is skr. 1000-2000. A somewhat costlier system employing electronic counters and digital output for datalogging is under test. /TRRL/

  • Corporate Authors:

    Swedish National Road and Traffic Research Institute

    Drottning Kristinas Vaeg 25
    S-11428 Stockholm,   Sweden 
  • Authors:
    • Andersson, O
  • Publication Date: 1974

Language

  • Swedish

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 19 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00125635
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Report/Paper Numbers: NR 49 R&D Rept.
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM