Research Reports

Access Across America: Transit 2014

Principal Investigator:

Andrew Owen, David M Levinson

September 2014

Report no. CTS 14-11

Topics: Planning, Traffic Modeling and Data, Transit, Urban Transportation

Accessibility is the ease of reaching valued destinations. It can be measured for various transportation modes, to different types of destinations, and at different times of day. There are a variety of ways to define accessibility, but the number of destinations reachable within a given travel time is the most comprehensible and transparent, as well as the most directly comparable across cities. This report examines accessibility to jobs by transit in 46 of the 50 largest (by population) metropolitan areas in the United States. Transit is used for an estimated 5 percent of commuting trips in the United States, making it the second most widely used commute mode after driving. This report complements Access Across America: Auto 2013, a report of job accessibility by auto in 51 metropolitan areas. A separate publication, Access Across America: Transit 2014 Methodology, describes the data and methodology used in this evaluation. Rankings are determined by a weighted average of accessibility, giving a higher weight to closer jobs. Jobs reachable within ten minutes are weighted most heavily, and jobs are given decreasing weight as travel time increases up to 60 minutes.

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