OK...we all know IANAL. But...if a city (any city) wants to implement "congestion pricing", I'm pretty sure the federal government has no jurisdiction. No? The state might, but not the feds. City streets are a local problem. I think the feds only have some say with regards to highways/interstates.

IAAL, though I confess on this issue I only know what I reads on the interwebs. But as a very general matter, local governments are not permitted to impose tolls on roadways that were built with federal funds. That's a broader category of roads than just highways and interstates. Apparently, a non-trivial number of the roads that are proposed to be tolled under the congestion pricing plan were constructed using federal funds.

That said, there's a program (the Value Pricing Pilot Program) that allows the federal government to give permission to local governments to impose tolls, subject to terms and conditions and possible revocation and whatnot. That's what the dispute is about - whether Trump has properly exercised the authority under that program to rescind the approval that was granted by Biden.