As Mr. Campbell kind of demonstrated, neither method is safe. It's 2021 and we still have single-walled pipelines. When there's a crack, we get a spill into a natural environment. Sometimes it explodes, while other times it burns.
Both methods are not safe. Safety measures need to be reinforced and maintenance staff hired. Maintenance is sometimes overlooked. They don't do many inspections of oil pipelines, or of railways. The problem is there, no need to look any further.