What is a megracity?

What does a red traffic light mean? What is meaning of Traffic Jam in Kannada? What is a lot of buses called? Full form of tc in railway? Which two countries are linked by the longest under sea subway? What is a famous french train? What is the walking distance from london victoria coach station to thistle hotel euston? What are the ways of improving urban sanitation? How much does the Greyhound bus cost from Seattle Washington to Akron or Canton Ohio? Can you get a credit card in California if you do not have a drivers license or state ID? How much does car driving classes in hyderabad cost? How do you think a railway helps a country grow? Why do trains have graffiti on them? What is toll price for the Ted Williams tunnel? What happens when you throw a jar into a London underground tube tunnel? What country is subway from? How much is the bus for Johannesburg to bulawayo? Why do you have to pay tolls to drive on the freeway? When did Mine Hill Railroad end? Where is the Canadian Rockies Train?