The Brief St. Petersburg crews are installing new bike lane dividers on First Avenue North from 20th Street to 28th Street to boost cyclist safety. The $100,000 pilot project uses rubber barriers nicknamed "zippers" to keep vehicles from drifting onto dedicated bike paths. Crews in St. Petersburg are placing new protective street dividers along major traffic corridors to keep cars out of bike lanes and increase rider safety. St. Petersburg traffic safetyWhat we know:Crews are placing rubber traffic dividers, nicknamed "zippers," between vehicle lanes and bike paths to increase bicyclist comfort and prevent cars from drifting out of their lanes. Courtesy: City of St. PetersburgCritical routeWhat they're saying:"This is a pretty critical bike lane in the city," Stacks said.