Taxicab data helps ease traffic

Traffic blows. It’s unhealthy and a waste of time. It is also a fact of life in almost every major city around the world, especially in fast-developing China whereas many as 20 million rural farmers migrate to the cities each year looking for jobs and a better life.

To help urban planners determine where to build new roads, subways, skyscrapers and shopping malls to absorb their new residents, researchers are turning to data collected by GPS systems in taxicabs.