@article{ref1,
title="Keywalk. a key operated extension of 'walk - don't walk' traffic signals",
journal="Road and transport research",
year="1995",
author="Winkler, F",
volume="4",
number="1",
pages="103-106",
abstract="KEYWALK is a tool available to traffic engineers to provide a service to a section of the community previously not catered for a traffic signals. It is simple, inexpensive, and has the potential to provide a new degree of freedom for mobility impaired pedestrians. This paper describes the concept and hardware of the KEYWALK system.   <p>Language: en</p>",
language="en",
issn="1037-5783",
doi="",
url="http://dx.doi.org/"
}