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billie l bentzen
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Accessible pedestrian signals
Billie L. Bentzen · U.S. Access Board
37 sayfa · 1998
Audible pedestrian traffic signals / Traffic signs and signals
Techniques for Improving Communication With Visually Impaired Users of Rail Rapid Transit Systems
Billie L. Bentzen · U.S. Department of Transportation, Urban Mass Transportation Administration
36 sayfa · 1981
Assistive Technology / Orientation and Mobility
Solutions for problems of visually impaired users of rail rapid transit
Billie L. Bentzen · The Office
273 sayfa · 1981
Barrier-free design / Blind / Local transit stations / Travel
Information about visual impairment for architects and transit planners
Billie L. Bentzen · National Technical Information Service [distributor]
57 sayfa · 1981
Barrier-free design / Blind / Local transit stations / Travel