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Sometimes the term “accessibility” is used in reference to the rules under the Americans with Disability Act. In this context, “accessibility” is about mobility; how people on the move reach their destinations.
When people travel, they generally do it with purpose: work, play, school, run errands, etc. Measuring accessibility brings WSDOT closer to figuring out what people care about when they travel – how difficult it is to reach their destinations by different travel modes. Accessibility measures take into account both the condition of the transportation system and the way the land is used in its service area. By measuring accessibility, WSDOT can:
WSDOT is using accessibility metrics to…
WSDOT uses the GIS add-in, Cube Access, to measure accessibility. This tool provides scores that rate access to destinations for each method of travel. It can also calculate travel times to certain types of destinations, and identify the number of that type of destination within “x” minutes of travel from the starting location.
We are able to determine:
Virginia's Smart Scale. The Virginia DOT has measured accessibility improvements for the last three rounds of its Smart Scale project prioritization process and applied Cube Access in its second round, with technical support from SSTI.
Hawaii's SmartTRAC (pdf, 12 mb). The Hawaii DOT applied accessibility metrics using Cube Access for the first round of its SmartTRAC project prioritization in 2018, with technical support from SSTI and Smart Growth America.
Other accessibility examples from the following MPOs:
Kyle Miller
Transportation Planning Specialist
360-705-7946
Kyle.Miller@wsdot.wa.gov