David Coggin

Leveraging Vissim Modeling

Vissim modeling allows individuals to map various intelligent traffic management systems to stabilize traffic flow and increase traffic safety. Vissim is a microsimulation tool that models individual vehicles in the traffic stream, considering the actions of virtual drivers in response to other vehicles, the road network, and various traffic controls. Sain Associates built a Vissim…
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10 Years of APPLE

What does a fruit have to do with engineering? Well, in this case, it’s one of the first steps in the preliminary engineering process. The Advanced Planning, Programming, and Logical Engineering (APPLE) program is administered by the Regional Planning Commission of Greater Birmingham (RPCGB). The goal of the program is to assist local governments in…
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Bicycle and Pedestrian Planning 101

Who doesn’t love to ride a bike or walk around their city? Have you ever thought about the planning that goes into making a street bicycle- or pedestrian-friendly? Historically, roads have been designed to get vehicles from point A to point B as quickly as possible, without a lot of regard for other road users…
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