I think the DOTs must be having a really hard time understanding what is happening now, with declining numbers of motorists. Always in the past, you would build a road, ridership would steadily increase, the road would get clogged up, and then you'd have justification for another road. If fewer people are driving, that messes up every assumption built into their lifeblood. Banks won't buy bonds for turnpikes if they don't think they're going to be paid back, states and the Feds won't allocate funds for new roads if they aren't needed. What are the DOTs going to do now? Fix existing infrastructure? Boring!
OTOH, our own PennDOT sometimes gets things right: the new issue of SpokesPeople:
ftp://ftp.dot.state.pa.us/public/Bureaus/press/SpokesPeople/Spokes-People_Fall2013.pdf