Middle-class Algerians bought so many imported Renault, Peugeot and Hyundai cars that the government slapped on a sales tax to reduce traffic jams.

ECONOMIST: Why Algeria is still dull and gloomy

Singapore has also deployed GPS technology to reduce traffic jams, a tactic that Naveen Lamba, an transportation analyst with IBM, has proposed we adopt for our clogged roadways here.

FORBES: Can GPS Solve Our Traffic Woes?

But there's only one sure-fire way to reduce air traffic jams: put fewer planes in the sky.

FORBES: Fuel Costs Could Trim Summer Air Travel. A Bit.