You can usually install a driveway , but it has to not contain rebar or mesh inside the ROW, and it has to be saw cut into 4' squares so it can be moved off the line in the event of a emergency . Plannting trees or building structures inside the ROW is not allowed . When tilling its preferred for ya to go under the line . But thats not awlways possible so usually ya can tile above as long as paperwork is signed releasing the gas company from liability if they hafta dig thru . We always try to fix any tiles we dig thru tho . Other utilities crossing where grade isn't important usually hafta go under unless the gas line is really deep