Amtrak has been the fastest-growing domestic transportation mode over the past 15 years, the report said.

CNN: Amtrak is on track to weather any spending cuts

They serve many of the fastest growing population centers and provide a fuel-efficient, environmentally responsible and safe mode of freight transportation.

FORBES: Riding The Rails With CSX To $32 A Share

As far as the preferred mode of public transportation goes, however, Tsao belongs to a growing number of Beijing residents who are opting for the slower bus to the supposedly far more efficient subway.

CNN: Beijing commuters feel the squeeze

Traders returned to panic mode on Tuesday in response to the rising price of oil and the growing uncertainty in what is now being referred to as MENA (Middle East, North Africa).

FORBES: First There Were PIIGS to Worry Over, Now We Have MENA

Private commuter minibuses, known as "daladalas", are the main mode of transport in Dar es Salaam, one of the world's fastest-growing cities.

BBC: Tanzania: Dar es Salaam launches first commuter trains

They serve many of the fastest growing U.S. population centers and provide Americans with a fuel-efficient, environmentally responsible and safe mode of freight transportation.

FORBES: Ride Union Pacific To $112 As High Fuel Prices Propel Railroads' Margins Higher