Are there numbers to back this up?

https://en.wikipedia.org/wiki/Congestion_pricing_in_New_York... says "By July 2025, there were 67,000 fewer daily vehicles in the congestion zone compared to before implementation. The same month, one study found that travel times within the congestion zone had decreased, and that delivery companies were opting to use smaller vehicles (which were charged lower tolls) in the toll zone".

Your comment aligns with what I said. "Over the summer"