Green Your Being (GYB) and the Transit Accessibility Index (TAI): Sustainable Transportation Choices
TAI: NoVa (Example)
View Green Your Being in a larger map
This map offers an example of the differences in transit accessibility in Northern Virginia during rush hour.
The most accessible location shown is located at or near the Rosslyn WMATA rail station. During rush hour, the Transit Accessibility Index (TAI) is 1.0, meaning that one can expect to travel two and from this location by public transit in the same amount of time as by private vehicle. Venues within the blue circle, within 0.9 miles of the station, have a TAI of 1.5.
While transit accessibility around WMATA rail stations is always good, locations served by buses may have good accessibility scores as well. The bus terminus at Tysons Corner Shopping Center produces a TAI of 1.9.
While the Arlington County DHS is also served by buses, it isn't a terminus, and as a result, its TAI score is 2.2.
The least accessible location in illustration is the Hilton Springfield, with a TAI of 2.5.
Map Key:
Silver Star: TAI <1.0
Green Teardrop: TAI <=1.0<1.5
Yellow Teardrop: TAI <=1.5<2.0
Red Teardrop: TAI <=2.0<2.5
Exclamation Mark: TAI <=2.5
Circle: TAI <=1.5
Silver Stars indicate locations that are Most Accessible, with TAI scores of less than 1.0. It is faster to travel to these locations by public transit than by private vehicle. These are very rare.
Green Teardrops indicate locations that are Very Accessible, with TAI scores of 1.0 or more but less than 1.5.
Yellow Teardrops indicate locations that are Accessible, with TAI scores of 1.5 or more but less than 2.0.
Red Teardrops indicate locations that are Poorly Accessible, with TAI scores of 2.0 or more but less than 2.5.
Red Exclamations indicate locations that are Very Poorly Accessible.
Black Stars indicate locations that are Inaccessible. These location are not served by public transit.
The circles surrounding the Silver Star and Green Teardrop locations indicate the distance around these locations where the TAI scores are also less than 1.5--businesses located anywhere within these circles are very accessible.
