This calculator contains a database of the “accessibility” of over 1,400 Bay Area neighborhoods. Accessibility refers to the number of destinations – jobs, schools, medical facilities, etc. – which can be reached from a neighborhood in a given amount of time. Accessibility is affected by the location of a neighborhood, the quality of its various transportation connections (roads, highways, buses, trains), as well as the location of trip attractors.
This calculator provides two metrics: a simple number of destinations that can be reached within 15, 30, or 45 minutes by automobile or transit, and a composite score, based on automobile ownership. For example, for a neighborhood where all households have automobiles, the composite would equal the number of reachable destinations by automobile, while for a neighborhood where half of households have automobiles, the composite would be an average of the number of reachable destinations by automobile and the number accessible by public transit.
After these numbers are presented, a statistical test is performed to see if the group of neighborhoods of interest to the user is significantly different from all of the neighborhoods in the Bay Area. The statistical measure used here, a t-score, shows how different a neighborhood is from the regional average. A larger score (positive or negative) means the difference is more significant.
The user can choose neighborhoods to analyze in three ways: 1. by choosing a specific neighborhood, 2. by choosing all neighborhoods with a specific racial/ethnic composition, or 3. by choosing all neighborhoods with a specific poverty level or share of households without private vehicles.