Our friend Wendell Cox has crunched the numbers on transit increases and declines in automobile travel over the last year. High prices have sent travel on our urban roadways down about 25%. Urban transit increased by about 1% (in overall travel, not riders). The result, on net, is a market share of 3% of the decline.
The good news: markets work. We are not "addicted" to cars. As the cost of driving them goes up, we reduce our travel.
The bad news: much of this lower travel demand may reflect people forgoing the benefits of mobility as they stay home and don't get out as much, don't patronize the movie theater, or got to restaurants.