Abstract: A device and a system for an oil field road crossing and a method of installing thereof. A plurality of conduits having a rectangular cross-section with a coupling header on each end are set in the ground at the road crossing, the conduit top surfaces substantially level with the ground. The long sides of adjacent conduits are welded together in parallel. The coupling headers are in fluid communication with the rectangular conduit, each header have an open end operative to connect to the end of a cylindrical pipeline. When cylindrical pipelines are connected to the headers, one at each end of the rectangular conduit, the pipelines are in fluid communication with each other. The flat surfaces of the rectangular conduits form a road crossing substantially level with the ground for a vehicle to safely travel over without disrupting flow through the pipelines absent burying the pipelines.