Individual travel, while possible, requires onerous paperwork, so most Chinese travel in large groups.

Such travel would require only the energy to transmit enough powerful signals suffently long time so that they reach the target destination.

Local taxis have been banned for all staff and overseas travel requires the agreement of a director.

Such travel does not require prior approval, though travelers may be asked to prove that they qualify for it.

"Less enlightened beings are almost certain to destroy themselves before they figure out how to handle the energy sources interstellar travel requires."

She introduced herself with the automatic manners of the old, not recognizing or caring that modern travel didn't require it.

There are no roads in 85 percent of Suriname, so independent travel requires flexibility and time.

Long-term travel doesn't require a massive "bundle of cash"; it requires only that we walk through the world in a more deliberate way.

Tourism, health and transport infrastructure is poor and travel requires careful planning.

Portal travel requires both a sending and a receiving device in order to transport a person or cargo.