Mobility vs. Vision: ADA Crosswalks

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plan of street crossing with curb ramps offset from straight route, discourages bikes on sidewalk, gives blind a curb instead of ramp        plan of street crossing with ramp in line of travel, putting blind users on ramp, no curb
Offset Curbs vs. Straight Curbs

Universal? Is it universal?
Is it designed for a wide range of abilities and needs?		  

VISION PATTERNS

No Protrusion Hazards

Safe Crossings

Effective Shorelines

Visual Contrast
Effective? Is it effective?
Does it actually work for the specific needs?
Has it been tested or at least reviewed by representatives of a wide range of users?
Is it supported by research, design standards, or other sources?
Welcoming? Is it welcoming?
Does it feel natural and comfortable for all users?
Does it discriminate unnecessarily on the basis of ability?
Does it give the impression of disability-based discrimination?
Durable? Will the design solution be durable over time?
Can it accommodate change through flexibility, adaptability, or adjustability?