Overbridge and Flyovers are planned and constructed to that allows traffic to pass over a road, river and railway. These overpasses reduce congestion in city roads and also connects with the highways and expressway. Flyover, Overbridge,underpasses, overpasses are the best examples of engineering marvel.
A Flyover is a long structure also known as an overpass, built over an existing ground road or over a overpass. The longest flyovers are called elevated expressway and have become very common in big cities of India like Hosur Road Elevated Expressway and Narasimha Rao Elevated Expressway.
Overbridge is a bridge made over a road, river, railway line that allows traffic to pass over and connect across road. They are planned to continue the road without any obstacles like railway line and lowlands.
Elevated Expressways are actually long distance flyovers to improve the movement of traffic across the main cities such as Bangalore,Hyderabad and Delhi. Narasimha Rao Elevated Expressway and Hosur Road Elevated Expressway are the two best example of Elevated Expressway in India.