A loud message.

But perhaps not quite so clear?

This was on the walk to Lowe's which is not a pretty walk. It's chock full of speeding cars, little-to-no sidewalks, some careful walking along the edges of mud, various industrial things and then a boring section of seemingly endless parking lot and big box-type stores. It's a utilitarian walk.  So I heard the message on the sign loud and clear, but I was confused by what it was telling me.  I was confused enough to stop and ponder.  My first question was  "My left, or your left?"  I think they must have meant my left, so I looked to the left of the sign and saw nothing that looked extremely dangerous, just more parking lot and building.  Then I looked to my left and saw the usual, cars driving by, sidewalk.

I finally decided the extreme danger was the steady flow of cars exceeding the 40 mph speed limit in the quest to get to the freeway on-ramp.  And I think the people who put up the sign are not the business we see in the picture, but the business across the street.  Their customers must pull out of the lot into very fast traffic.  The road slopes a bit so visibility might not be very good.  With my mystery solved--at least in my mind--I walked on to Lowe's and purchased my plastic anchors and wandered back home.