Category: Transportation Engineering

Non-circular Roundabouts Have Their Place

Most drivers think about roundabouts as perfect circles: You pull up to the roundabout, yield to the cars coming from your left, enter the roundabout, and drive counter-clockwise until exiting onto your desired road. About the Expert: Kevin Kuhlow, PE, is a leading roundabout designer in the US. He has been involved with developing hundreds… Read More »

How Do You Know What Roads are Good Candidates for Mill and Overlay?

By Mark Petersen, PE Structural layer coefficient. Excavation below subgrade. K values. Cold in-place recycling. If those terms aren’t familiar to you, not to worry. Transportation engineers are well-versed in the vocabulary of road repairs, and you can rest assured that what’s happening on the other side of those orange barrels is for the benefit… Read More »

Factors Affecting the Lifespan of Paved Roadways: Construction Materials, Temperature Extremes, and Drainage

Across the country, one-third of our highways and major streets are in poor condition, according to TRIP, a nonprofit transportation research group. Persistent potholes and recurring ruts wreak havoc with our commutes, impose financial burdens from automobile repairs, inflict significant injury, prompt contentious lawsuits, and account for roughly one-third of deaths occurring annually on American… Read More »