I tried to find a security guard or a policeman to photograph this week, but hey, there's never one around when you want one. Or have your camera handy *g*
So a different guard. A guard rail.
I quite like the way the lines flow in this picture of the access ramp at a Metro station.
And this one I like for the over-kill.
There is actually a small stream running under the path at that point, but even so...