Congestion Charge does not end Congestion

From the Guardian: London still gridlocked despite congestion charge

Apparently, the problem is not that the congestion charge reduced demand (trips entering are lower), but that supply has been contracted due to road works and pedestrianization schemes.

Again of course, the objective in a dense city center should not be to move cars faster through the center, it should be about moving people to their destinations in the least time, and giving them more possible destinations.

Also the term "gridlocked" is used quite loosely and hyperbolically here.