Manhattan commuters are already marveling at what appears to be less traffic — and grousing about the new $9 tolls.

The first week of congestion pricing brought a measurable dip in traffic on bridges and tunnels leading into Manhattan and an increase in transit ridership, but no significant improvement in speeds inside the zone subject to the new toll, according to officials and traffic researchers.

For the first time on Monday, some New York City families and educators commuting to school by car faced a $9 toll upon entering a swath of Manhattan. The toll — a result of the congestion pricing program — charges drivers who enter Manhattan at or below 60th Street in order to help finance public