A strike called by a New York City taxi drivers' group over city plans for a high-tech video-and-fare system thinned the ranks of yellow cabs on the streets yesterday, producing frustrating waits on corners, long lines at the airports and angry exchanges over an ad-hoc fare system.

Union leaders and city officials differed over the effectiveness of the walkout. The New York Taxi Workers Alliance, which called the strike, maintained that 90 percent of drivers were idle yesterday. But Mayor Michael R. Bloomberg said the figure was far lower.

Still, many would-be passengers spent more time with hands in the air, stuck in that eternal pose of big-city hopelessness. And at the airports, a five-minute wait for a cab stretched to half an hour at some terminals, with 25 people waiting in line, looking at their watches, wondering why they were suddenly going nowhere when the plane had been on time.

The city had introduced a zone-based fare structure during the planned two-day strike - the ride into Manhattan from Kennedy International Airport would be set at $45, for example - but according to anecdotes, at least, the plan seemed to sow more confusion than convenience. It permitted group rides, but some drivers were unaware of it and were uncertain how much to charge. That led to more than one instance of audible angry dialogue between passengers and drivers.