Bicycle-friendly Copenhagen tries to ease crowded lanes.

• Author: Block, Ben
• Position: EYE ON EARTH - Brief article

As Denmark's capital city strives to reach cycling rates of 50 percent, transportation officials face a problem that few urban areas have had to confront: bicycle congestion. In the Copenhagen metropolitan area, where more than a third of residents pedal to work, more cyclists are complaining that cramped lanes push them closer to cars or buses.

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The Danish Transport Research Institute estimates that 47 percent of cyclists feel unsafe riding on Copenhagen streets, up...