Tag: Federal Highway Administration

Pushing Your Luck? Heed Advisory Speeds

By Troy Robillard, PE People ask me from time to time about those yellow speed signs that can be found on sharp highway curves, on and off ramps, or any place where drivers should exercise caution, such as a narrow bridge. What are those called? Can law enforcement pull you over for exceeding those speeds?… Read More »

Does My Bridge Need An Inspection?

Inspections are not required for this “nonqualifying” bridge in Broomfield, Colorado, but the City and County have such structures inspected regularly anyway. By Brian Schroeder, PE, CBI, CWI The federal government oversees and tracks the inspection and condition of the nation’s more than 600,000 bridges and pays for much of the repair and replacement to… Read More »

What Is Bridge Scour? Why Should You Care?

The most common cause of bridge failures is from floods scouring bed material surrounding bridge foundations. What is scour? Simply put, scour is the engineering term for the erosion of soil surrounding a bridge foundation (piers and abutments). Bridge scour occurs when fast-moving water around a bridge removes sediment from around the bridge foundation, leaving… Read More »