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 »
Tags: Alligator Cracking, Asphalt, Concrete, Highway Design, Highway Engineering, Longitudinal Cracking, Mill and Overlay, Roadway Rehabilitation, Transverse Cracking
Climate Change Intensifies Stormwater Challenges
By Karen Menné-Jacobsen April showers have long been celebrated for their delivery of May flowers. But due to the Earth’s relentlessly changing climate, showers and snowstorms that occur every month of the year are doing so at increasingly torrential rates. And that poses significant challenges related to stormwater and how to handle it. About the… Read More »
Tags: bioswale, BMP, Depressed Median, Impervious Surfaces, NPDES, Pollutants, Rain, Stormwater, Water Quality, WDNR
Underwater Inspection: When, Why, and How
By Rick Maslyn, CBI Some of the most important foundation elements of a bridge are its least visible – the abutments, piers, piles, and footings submerged under the waterline. Regular inspection, both above and below the waterline, helps to keep aging structures solid and stable. About the Expert: Rick Maslyn, Ayres’ supervisor of structural inspection,… Read More »
Tags: Bridge, Bridge Inspection, Erosion, FHWA, National Bridge Inspection Standards, NBIS, NHI, Scour, Underwater Bridge Inspection, Underwater Inspection, Unmanned Surface Vessel, USV