The sentence "efficient public transportation system" is correct and usable in written English.
You could use it in any type of writing, such as in an essay, a newspaper article, or a report. For example: "To help reduce carbon emissions in our city, we should build an efficient public transportation system."
The cheapest way to experience it all is to buy the I Amsterdam Card (www.iamsterdamcard.com), which for 31 euros offers access to the city's most important museums, two boat tours and unrestricted use of the city's efficient public transportation system.
Sète, about 20 miles southwest of Montpellier, has grown from a small fishing village to a busy international port, with museums, theaters, a covered market, daily wholesale fish auctions, waterfront restaurants and shops, and an efficient public transportation system.
To address this issue, an efficient public transportation system is designed by developing a new bi-level mathematical model.
The most important one is a widely available and efficient public transportation system.
New York has by far the most well-planned and efficient public transportation system of any city in the country.
The city has one of the most efficient public transportation systems in the world.
The city boasts one of the most efficient public transportation systems in the world.
"If cities had efficient public transportation systems, residents could walk to and from the bus or subway and leave more space on the roads for bicycle lanes.
Instead, the CSE recommends stringent emissions standards for two-wheelers, an effective vehicle inspection program, fiscal incentive programs to replace existing two-stroke engines with four-stroke ones, and the development of efficient public transportation systems.
The very efficient public transport system ensures easy accessibility.
To get around, buy a packet of 10 tickets (2,050 forints) for the city's efficient BKV public transportation system (www.bkv.hu ).
