Road structure – process – or apparatus – Traffic steering device or barrier
Patent
1984-11-15
1986-11-04
Leppink, James A.
Road structure, process, or apparatus
Traffic steering device or barrier
404 9, 404 72, 52174, 52180, 434112, E01F 1100
Patent
active
046208160
ABSTRACT:
A guidance system is disclosed for permitting a person whose vision is impaired to continuously know his or her location with respect to the boundaries of an area having a walking surface and the spatial dimension of the area traversed. The guidance system comprises a plurality of tactual stimuli having predetermined physical characteristics distributed over substantially the entire walking surface. The physical characteristics of the tactual stimuli vary in a predetermined detectable manner in relation to proximity to the boundaries. The variation in the physical characteristics is detectable by the touch of a person traversing the walking surface. Preferably, the tactual stimuli comprise three sets, each set of tactual stimuli being distributed over a separate portion of the walking surface. All of the tactual stimuli of each set has substantially the same physical characteristics. However, the physical characteristics of the stimuli of each of the three sets are different from one another to form a tactual gradient. A fourth set of tactual stimuli may also be included to indicate the location of an obstacle or landmark. A fifth set of tactual stimuli may also be included to indicate the location and nature of impending intersections.
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Leppink James A.
Smith Matthew
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