The Brookings Institution just released a new report, Missed Opportunity: Transit and Jobs in Metropolitan America, examining the mass transit systems in the 100 largest American cities. Here are some of the findings:

Nearly 70 percent of large metropolitan residents live in neighborhoods with access to transit service of some kind…

The typical metropolitan resident can reach about 30 percent of jobs in their metropolitan area via transit in 90 minutes…

About one-quarter of jobs in low- and middle-skill industries are accessible via transit within 90 minutes for the typical metropolitan commuter, compared to one-third of jobs in high-skill industries…

Fifteen of the 20 metro areas that rank highest on a combined score of transit coverage and job access are in the West…

With the primary focus of the report on jobs, there is a lot of interesting data. Here are a few things I noticed in going through the full report:

-Page 3 highlights three trends for metropolitan areas: “metro growth and expansion” with both city and suburban growth during the 2000s, “employment decentralization” (with a figure that only roughly 20% of metropolitan jobs are within 3 miles of the city center), and the “suburbanization of poverty.”

-Page 4 notes some of the problems of mass transit in today’s metropolitan regions: “old hub and spokes” which don’t work as well since “39 percent of work trips are entirely suburban” (a problem in the Chicago region, hence the need for the Star Line), “serving low-density areas” (a problem in many suburban areas and a recurring problem in the western suburbs of Chicago such as Naperville), and “spatial mismatch and the costs of transportation” (the idea that the people who work in certain jobs/industries don’t necessarily live near these jobs).

-Page 13 has an explanation for why they chose a 90-minute one-way commuting threshold in the study. If you change the threshold, the percent of jobs available changes quite a bit: “[A]cross all metro areas, the typical worker can reach about 30 percent of total metropolitan jobs in 90 minutes. At a 60-minute commute threshold, only 13 percent of jobs are accessible for the typical worker. For a 45-minute commute, the share drops to 7 percent.” This seems to be quite a high threshold but as they note, more than half of metropolitan commutes are longer than 45 minutes (according to 2008 American Community Survey data).

-Page 18 has a graph comparing the availability of high/medium/low skill jobs within 90 minutes by city or suburban setting. Interestingly, a higher percentage of jobs accessible from the city were high-skill while a higher percentage of accessible suburban jobs were low-skill.

-Pages 20-21 look at some of the differences between the West, with the most accessible mass transit and higher percentage of accessible jobs, and the South, the region at the other end of the spectrum. The findings about the South are not too surprising as it is known for sprawl but the finding that the West dominates the list of cities (15 of the top 20) is interesting. Does this suggest that these Western cities have made much more concerted efforts to provide mass transit?

If you look at the more specific data for the Chicago region, it appears to be fairly average compared to the other 100 metro areas.