Showing 1 - 10 results of 10 for search 'Helliar-Symons, R. D.', query time: 0.12s Refine Results
  1. 1
    Automatic speed warning sign : Hampshire trials /
    by Helliar-Symons, R. D.
    Published 1984
    Book
  2. 2
    Automatic close-following warning sign : further trials /
    by Helliar-Symons, R. D.
    Published 1986
    Book
  3. 3
    Accident reduction and prevention programmes in Highway Authorities, 1987 /
    by Helliar-Symons, R. D.
    Published 1989
    Book
  4. 4
    Yellow bar experimental carriageway markings : accident study /
    by Helliar-Symons, R. D.
    Published 1981
    Book
  5. 5
    Masking of brake lights by high-intensity rear lights in fog /
    by Helliar-Symons, R. D.
    Published 1981
    Book
  6. 6
    Automatic close-following warning sign at Ascot /
    by Helliar-Symons, R. D.
    Published 1983
    Book
  7. 7
    M1 chevron trial - accident study /
    by Helliar-Symons, R. D.
    Published 1995
    Book
  8. 8
    Count-down signs and roundel markings trials /
    by Barker, Judith
    Published 1997
    Other Authors: “...Helliar-Symons, R. D....”
    Book
  9. 9
    Installation and evaluation of chevron markings on motorways /
    by Webster, P. B.
    Published 1992
    Other Authors: “...Helliar-Symons, R. D....”
    Book
  10. 10
    Visual acuity in yellow headlights /
    by Christie, A. W.
    Published 1968
    Other Authors: “...Helliar-Symons, R. D....”
    Book
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