Half a million more vehicles crossed the Hudson River into the city between 4 and 6 a.m. last year than in 2000 , although inbound traffic declined between 6 and 10 a.m . But the Port Authority of New York and New Jersey , which operates the Holland and Lincoln Tunnels and the George Washington Bridge , attributed most of that shift to an off-peak discount that it started offering five years ago to drivers who pay tolls with E-ZPass .