Showing 1 - 4 results of 4 for search 'Helliar-Symons, R. D.', query time: 0.02s Refine Results
  1. 1
    by Helliar-Symons, R.D
    Published 1984
    Book

    Automatic speed warning sign - Hampshire trials
  2. 2
    by Helliar-Symons, R. D.
    Published 1983
    Book

    Automatic close-following warning sign at Ascot
  3. 3
    by Helliar-Symons, R. D.
    Published 1981
    Book

    Yellow bar experimental carriageway markings accident study
  4. 4
    by Helliar-Symons, R. D.
    Published 1981
    Book

    Masking of brake lights by high-intensity rear lights in fog
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