Beijing and mexico have the worst traffic jams in the world,a study said.

Most of the 8192 motorists interviewed for the IBM Commuter Pain Study in 20 cities around the world said traffic has woresend in the past three years.

Beijing and Mexico city scored 99 out of 100 in IBM commuter pain index,trailed closely by Johannesburg,Moscow and New Delhi.

Los Angeles had the worst traffic of all US cities and along with New York and Houston,Texas has the longest commutes anywhere in the world.

Moscow outshined its rivals for the longest traffic jams,averaging 2.5 hours-the world average was one hour.

Instead in Buenos Aires,Melbourne and Stockholm,25% of commuters said they never stuck in traffic.

IBM study was based on 10 issues,including commuting time,time stuck in traffic anf the traffic flows impact on stress,anger and work.