The Big A

The designed environment is always changing. We’ll help you get up to speed.

One-Way or the Other? Two-Way Traffic Conversion Requires Study

By Alexander Cowan, PE, and Alexandria Motl, PE Alexander Cowan Alexandria Motl A drive through the downtown area of many American cities includes time spent on one-way streets. Cities have used short segments of one-way traffic for hundreds of years to try to improve traffic flow and move higher volumes of traffic along downtown arterials.… Read More »

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A Proactive Program at Work: Investing in Dam Repairs Averts Crisis

By Chris Goodwin, PE Dams are an integral part of our lives, providing recreational opportunities, power generation, flood control, wildlife habitat, and other important functions. More than 2,100 high-hazard-potential dams are operating in the United States, as reported in the American Society of Civil Engineers’ 2017 Infrastructure Report Card. Their failure could result in the… Read More »

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Best Management Practices for Stormwater Runoff Facilities: Detention vs. Retention

April showers bring more than May flowers. Snow melt and springtime rains also bring stormwater runoff pains. Why is stormwater runoff a problem? Stormwater runoff impacts two areas: water quantity and water quality. When vegetative surface cover is replaced with streets and buildings, the rate of stormwater runoff, which starts as precipitation (rain, sleet, and… Read More »

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