By midafternoon, the passing flickers of blue were already ubiquitous — negotiating light taxi traffic in the West Village, hurtling through the protected lanes of Midtown, drifting toward the Brooklyn waterfront.

For the first time, under cooperatively clear skies, New Yorkers sat astride the city’s first new wide-scale public transportation in more than 75 years: a fleet of 6,000 bicycles, part of a system known as Citi Bike, scattered across more than 300 stations in Manhattan below 59th Street and parts of Brooklyn.

There were kinks in the system’s early hours. A bike was swiped on Sunday as crews worked at the last minute to fill the stations. A mail delivery snag left as many as 200 members without access to the system. Some tourists dipped credit cards in vain for minutes, unaware that the program was initially open only to annual subscribers.

But Monday’s riders were, by definition, an eager and forgiving cross section: founding members who registered for a yearly pass for $95, allowing them to ride between stations for as long as 45 minutes with no added charge.