Diagnostic Test 20

During the first two days of a pricing pilot, traffic entering the tolled cordon dropped sharply while counts on untolled bridges rose by 12%.

Following adoption of congestion pricing, region-wide vehicle miles traveled fell by 8% and remained 6 to 9% lower for two years, with no measurable increases on parallel corridors, after controlling for fuel prices and transit frequency.

Cities with congestion pricing also invest heavily in subways and exhibit lower per-capita driving than cities without pricing.

Sensors showed 15% fewer vehicle entries into the priced downtown area during peak hours in the first month after implementation.