Pipelines
This mode of transportation is responsible for the movement of raw materials and finished products over great distances from facility to facility, facility to distribution terminals, or facility directly to end users. Pipelines can also be used to transport materials within a facility from one process to another. Pipelines are very safe and effective means of transporting large volumes of liquid and gas products such as petroleum and natural gas. Pipelines may be above ground or below ground or underwater. In many cases they follow right-of-ways next to other transportation routes like highways and railways. Pipeline markers can be seen along these routes.
This is an image of silver pipes behind a fence coming out of the ground.