She organized a protest in the East Village last month, and she and at least two groups of opponents are planning new rallies against local bicycle lanes. They have discussed joining up for one large protest, though none has been planned.

Cycling advocates have taken notice. They have begun to mobilize more  seeking to undercut any antibicycle rally by their own presence  and have increased pressure on city officials to continue the pro-bicycle agenda. On Nov. 10, for example, advocates and bike riders massed in front of City Hall to protest the Transportation Department’s decision to scale back on parking-protected lanes along First and Second Avenues.

“It’s easy to focus on some of the conflict and friction,” said Paul Steely White, executive director of Transportation Alternatives, a bicycle and pedestrian advocacy group that has seen its influence grow under the Bloomberg administration. “But that’s always going to happen when you’re changing the geometry of something as dear as the asphalt. It takes some adjustment, and we’re definitely in that adjustment phase.”

There have been no independent polls of New Yorkers’ attitudes on bicycle lanes, though online surveys have proliferated in recent weeks. One such survey, focused on Prospect Park West in Brooklyn and sponsored by the City Council members representing Park Slope, has received thousands of submissions. “It’s a study period  that’s how D.O.T. put it,” one of those members, Councilman Brad Lander, said. Results should be ready before January, when the department is likely to reach a conclusion on whether the Prospect Park West lane has been a success.

New York has a long relationship with the bicycle, with the first bike path in the country running along Ocean Parkway in Brooklyn as early as 1894.

Interest in better bike infrastructure was revived under Mayor John V. Lindsay in the 1970s. The first separated bike lanes, similar to those that now exist on sections of Eighth and Ninth Avenues in Manhattan, were installed by Mayor Edward I. Koch in 1980 on Avenue of the Americas and Seventh Avenue  though they were quickly removed amid fierce opposition.