Expanding population and influx of migrant workers are closely related to the problem of transportation.

人口激增与外来民工大量涌入与交通问题息息相关。

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Relief agencies say the immediate problem is not a lack of food, but transportation.

救援机构称当务之急不是食品匮乏，而是交通运输不足。

《柯林斯英汉双解大词典》

As we all know it is the best way to solve the problem of the traffic transportation field, especially traffic jam, traffic accidents and traffic pollution.

它是目前公认的全面有效地解决交通运输领域问题，特别是交通拥挤、交通阻塞、交通事故和交通污染等的最佳途径。

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Ray LaHood, Secretary of the U.S.Department of Transportation, says distracted driving is a critical problem.

VOA: standard.2010.06.24

Richard Capka, administrator of the Federal Highway Administration, said Thursday that the agency would quickly advise transportation agencies around the country of steps they should take if a systematic problem with gusset plates was found, though he said no such advisory was yet in the works.

NPR: Officials Warn of Possible Flaw in Nation's Bridges

The complaints are regarded as indicators of a larger problem because many passengers may not realize they can file complaints with the Transportation Department, which regulates airlines.

NPR: Full Flights, Small Seats Make Passengers Grumpy

Another problem is that only a fraction of the children, whose parents can afford transportation, make it to hospitals and malnutrition centers.

BBC: Aid groups warn of Yemen 'catastrophe'