transportation system
transportation ***
transit **

The city does not have its own public transportation system.

We have a public transportation system that works quite well.

"They're part of a national transportation system that has to be open 24 hours a day."

Despite this, the city had a poor transportation system in the 1980s.

Some kind of transportation system would also serve the center.

"It will be the only place in the city with a 21st-century transportation system."

The transportation system in the district is already well developed.

"Take away a major transportation system, and we have big problems."

And I hear now that they may open up their transportation system to the general public.

But the new Secretary also said the nation's transportation system would need a lot of spending in the next few years.