New York City’s congestion pricing program appears to have reduced the number of cars entering the city's central business district by 7.5%. But experts warn against drawing conclusions too quickly.

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.

A new toll on drivers entering the core of Manhattan brought modest but measurable traffic reductions to New York City in its first week of operation.

Traffic entering Manhattan below 60th Street dropped by 7.5% in the first week after the start of a controversial $9 toll on driving in that area.