Why sitting in bumper-to-bumper traffic is becoming more of a headache

In emerging economies, many cities have reached the point where roads' carrying capacity is running out

Think traffic is bad in New York or London? They ain’t got nothing on Jakarta and Chongqing.

The top of TomTom NV’s ranking of the world’s most congested places is dominated by emerging markets. Among cities in rich countries, only Los Angeles makes it into the top 15.

Some of the world’s worst traffic snarls are in South Asian cities not even picked up by TomTom’s ranking, such as Dhaka, Delhi and Karachi. Their problems are only likely to get worse as growing populations and rising incomes push already-straining transport networks to the limit.

In emerging economies, many cities have reached the point