I have noticed many well marked crude pipelines near large shopping malls & schools in western Canada.

The real danger lies in pipelines carrying more volatile commodities than crude. Years ago I clipped a tube carrying natural gas into my house. I was using a Black & Decker lawn edger-trimmer. Back then they had metal blades not a nylon string.

The tube connected the small feeder utility pipeline to the gas regulator installed for my residence. The pipe in the ground was connected by a thin metal tube to the solid pipe by the gas meter. I thought that my house would blow up or catch fire. Fortunately there was no spark to cause ignition.  A new TUBE was installed by the gas company.