What the are the most common forms of transportation in the seven continents?

What is gravel under train tracks called? What country launched Europe's first super-high-speed passenger train in 1981? What is intramodal transportation? What does MrT look like today? How the Trans-Siberian Railroad affected settlement patterns in Russia? What the three colors you find on most traffic signs? When you cannot stop safely at a yellow traffic light you should? Name the tube station with all the vowels? What mode of transport reads the same forwards and backwards? What was a major challenge faced by the Union pacific railroad? Who invented the toll road? What locomotive weighs 500 tons? Whats Is The Name Of The Fastest Bullet Train? On what street is the Greyhound bus terminal located in Cleveland Ohio? What app can I download for cell phone gps tracking? When was the first victorian steam train invented? What does the HW stand for in relation to railway point machines HW2000? Is there a Greyhound bus from Niagara to Toronto? Which country have no train? How much does a proto type cost?