
BOGOTÁ, Colombia — The Colombian capital is home to 11 million people — and to some of the worst traffic jams in the world. That's why, after more than 80 years of dithering, Bogotá officials are finally building a metro, with help from China.
On a recent morning, workers moved mounds of dirt with bulldozers and installed steel reinforcement rods at one of the metro construction sites in central Bogotá. Line 1 of the metro, which will be an elevated train running 14 miles from the outskirts to the city center, is scheduled to open in 2028.