“It will have a cascade of positive effects on transportation and the economy and environment,” he said. About a dozen major cities are in discussions with technology companies to deploy so-called smart parking systems, though San Francisco is ahead in its efforts.

New York City is not among them. The Bloomberg administration’s plan for easing traffic through a congestion pricing plan died in the State Legislature this spring, though high gas prices are reducing traffic somewhat on their own.

Not that New Yorkers need any reminders of their traffic problems, but a study released in June by Transportation Alternatives, a public transit advocacy group, reported that 28 percent to 45 percent of traffic on some streets in New York City is generated by people circling the blocks.