You may know that mile markers, or mileposts, alert drivers of their location along an interstate or highway, but did you know about the other functions they serve? Mile markers are used to indicate the distance traveled within a state and the distance to a destination, such as a city or a town. The mileage…
Read More
Did you know a storm drain is the portion of a highway drainage system that receives surface water through inlets and conveys the water through storm pipes to an outlet? When determining pipe size, one must consider factors such as flow and elevation. A storm drain is usually a circular pipe because it is structurally…
Read More
Every project in its early planning and engineering stages must take erosion and sedimentation control into account. From 250,000 square-foot industrial facilities to small residential projects – there are practices in place and rules to follow on a state-by-state basis related to keeping excess soil from traveling into water bodies. Erosion is defined as the detachment…
Read More
Have you ever wondered what keeps a car from sliding off the road when you go around a curve? Or, have you ever noticed that it’s unnecessary to reduce speed for safety or comfort purposes when driving through a curve, even at high speed? The reason is superelevation. Superelevation is the banking of the roadway…
Read More
Before a new development can be built, the local government will often require a traffic impact study (TIS) to be performed. But what exactly goes into a TIS? The purpose of a TIS – also called a traffic impact analysis (TIA) – is to assess the expected traffic impacts to the roadway network surrounding a…
Read More
Did you know that pavement markings are not as simple as you might think? Pavement markings are used to convey many different messages to the driver, signaling which part of the road to use and where passing is allowed. Pavement markings use two primary indicators – color and line style – to relay information to…
Read More
With the addition of Harry Wilson, P.E., Brett Wiseman, P.E., and Gary Pitzing, PLS, Sain Associates now offers design, planning, and surveying services at airports. These three employees have approximately 60 years of combined airport experience. They have worked with the Alabama Department of Transportation Aeronautics Bureau and the FAA Airports District Office in Jackson, Mississippi, assisting…
Read More