DALLAS -- A makeshift bike lane divider made of painted two-by-fours and PVC pipes lasted three days on a busy Dallas street last month before the city removed it, which was two days longer than its creators expected.
The $100 structure was the work of the Dallas Transformation Department, one of several like-minded groups of anonymous Twitter users who have taken a do-it-yourself approach to making road improvements in cities stretching from New York and Boston to San Francisco.
Activists say a flower planted in a pothole or a line of cones or toilet plungers to keep cars from drifting into bike lanes can have the magical psychological effect of getting drivers to slow down and watch for cyclists and pedestrians. Although the measures are meant to be temporary, they can show the public what could be and spur cities to make permanent improvements.
"These transformation groups are creating change, and we support that," said Kathleen Ferrier, a spokeswoman for the Vision Zero Network, a group dedicated to eliminating traffic fatalities around the world. "What's happening with guerrilla tactics is that they are creating more urgency. It's helping people imagine and experience what change could be like."
Last month's project was the first for the Dallas Transformation Department, but it plans more.
"We knew it wouldn't be permanent. It would take a few times, but we believe people should have the power to give their neighborhoods value," said Layne, a group spokesman who declined to give his last name because the project was technically considered vandalism by the city.
City officials say it's not that simple. Business owners complain when street parking is replaced with bike lanes, and firefighters worry separated bike lanes could impede their emergency responses.
And there's usually a shortage of funds, said Jared White, who manages Dallas' bicycle transportation program within the Mobility and Street Services Department. Striping a buffered bike lane can cost $50,000 a mile or more if a crosswalk needs to be altered, and moving curbs to install bike lanes can cost millions, he said.
"It's difficult to get something on the ground right now," White said. "I understand the frustration, but there is a lot of planning and engineering that goes into bike lanes. On the street where they put the bike lane is right where we're about to put one in. It's going to happen within the next couple of years."
Dallas spent an estimated $300 and three hours removing the unauthorized bike lane divider because it didn't meet federal and state regulations.
It also presented a safety hazard, said Auro Majumdar, an assistant director of transportation operations for the city.
"The bicycle lane endangered any bicyclist using the illegal lane by exposing them to head-on collisions with a motor vehicle legally travelling in the marked travel lane," he said.
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