The program is the target of several lawsuits and of President-elect Donald J. Trump, who said he will end it permanently once he takes office on Jan. 20.

Driving into Manhattan's core will cost you more as of 2025 — but thanks to riding advocates, motorcycling remains comparatively affordable.

I spent nearly 50 years benefitting from the phenomenon of transportation supply creating its own demand. The more lanes we built, the more work there was for us to do. Now I spend most days thinking about how to manage demand. With good intentions, we left a few messes for others to fix.