China has already suffered through the world’s worst traffic jam, which was 60 miles long and lasted for 11 days, and its cities have developed a reputation for terrible traffic congestion. At the same time, China’s cities are usually crisscrossed by huge avenues and highways. How can such big streets become so easily clogged? This piece explains why big streets lead to bigger traffic jams, and how Bus Rapid Transit can be a solution to road congestion.