Economists do agree that highway congestion should be solved by pricing.
Things get more complicated after that:
Beyond that primary insight, however, there is much disagreement. Economists disagree over how to set tolls, how to cover common costs, what to do with any excess revenues, whether and how “losers” from tolling previously free roads should be compensated, and whether to privatize highways.
Robin Lindsey’s Econ Journal Watch article here.