Counties with popular public transit systems are often northern and coastal
The New York area has the largest percentage of people who use public transit to commute to work, followed by counties including major coastal cities like San Fancisco, D.C, and Boston.
Public transportation is less popular in counties including major southern cities.
Riding transit takes much loger than driving
Those taking transportation in areas where service is limited are bound to be in for longer commutes. In counties including major southern cities like Charlotte and Atlanta, the typical transit commute length is double the commute length for drivers. But, counties including major coastal cities with robust transit still show numbers that lag well behind driving.
Note that in areas were public transit is popular, the additional commute length for public transit users is shorter.
Public transit commuters earn less than drivers
Transit riders earn on average less than drivers. This gap in earnings between public transit commuters and drivers suggests that public transportation is less available in wealthier areas or people choose to avoid it if they can afford a vehicle.
Given that the difference in earnings is larger in areas with low transit use, the lack of an adequate public transportation system affects the low-income population disproportionately.