A post today from EMBARQ (WRI's sustainable transportation research organization).
China Transportation Briefing: How to Save China’s Capital?
"In February 2012, the number of cars in Beijing exceeded 5 million. Given the problematic levels of traffic congestion and air pollution in the Chinese capital, few people hailed the milestone as an 'achievement.'"
The article cites congestion and air pollution among the hazards of the situation, and then suggests a few potential fixes.