A few things to chomp on:
State lawmakers in California are understanding what parking is not. Free.
MARTA is a big reason why UPS located its headquarters in northern Atlanta. It's pretty interesting how much development happened around the MARTA stations outside of downtown.
Since High Speed Rail is such a newfangled thing to most people in the United States, many want to put it into the urban transit category when thinking about its mission. However this is not the case. In my opinion its intercity transport like airplanes. Often opposition to HSR brings out the density straw man to oppose expansion of intercity rail lines but then they would also have to argue that airports and greyhound bus stations need density to operate as well.
I also believe that HSR is a one way train. It's not necessary to have density to operate between cities but it starts the conversation on increased density and transit service once it gets there. And I feel that the comparisons to Europe and density are really mischaracterized discussions about connectivity and service levels. Ultimately the reason why HSR is fairly useful in Europe is because you can get a train to everywhere. Much like the Hub and Spoke airport system in the United States.
Wendell Cox is always a fun comic relief.