On a road I take to work everyday there has been some sinking in one of the lanes. I don't know what is causing it but the left side of the lane has been sinking for the last year or so. Finally the DOT put up a sign that read "DIP".
Last week they patched the roadway to remove the dip. The patch job does not exactly make the road surface smooth, in fact it looks like the asphault was dropped from a helicopter. Now instead of a sinking lane you have to drive over this clumpy raised area. Today the DOT replaced the DIP sign with a new sign that reads "BUMP".
Sorry, no libertarian rant about roads. I think government should oversee things that cannot be compartmentalized and roads would fall under that category.
I really preferred the DIP over the BUMP.