Bridge A Surname Xining Stock Photo

Bridges are large structures used to cross obstacles. It is precisely used to make traffic routes such as roads, railways, waterways, etc. or other facilities such as pipes, cables, etc. spanning natural barriers such as rivers, Straits, canyons, etc. or artificial barriers highways, railway lines. The purpose of a bridge is to allow people, vehicles, trains or ships to pass through obstacles. Bridges can be built on either side of a valley or channel, or rise to the ground, across the lower river or road, so that the traffic below is unimpeded.