A footbridge is defined by Merriam-Webster as "a bridge for pedestrians." It is further defined as "a bridge for people who are walking."
Although a footbridge is primarily made for people to walk on, people may also bike or skateboard on a footbridge, for example, or take pets on a walk on a footbridge. The only limitation to a footbridge is that they are not made for cars and other such vehicles.
A footbridge provides a safe way for people to get from one point of a certain location to another. A footbridge may be built above unsafe water crossings such as a river or above a street or busy highway.
Footbridges are designed using bamboo, wood, steel or reinforced concrete, among other materials.