Earlier quoted context omitted.
The car did not directly kill density, it enabled people to choose less density.
A small number of people like Robert Moses wielded enormous power over how our civil infrastructure was built in the post war period. Moses was famously opposed to public transit, going so far as to deliberately build bridges with overhead clearance too low for buses on routes to one of his beach developments. During this period the federal dept of transportation was offering to pay 90% of urban freeway projects. The…
How The US Government Sold Us On The Suburbs https://www.youtube.com/watch?v=HmL6xIg-EJ0