Transportation

Updating ALDOT’s Access Management Manual

Greek inventor Archimedes once said, “The shortest distance between two points is a straight line.” This idea is such a simple concept and can be seen in so many parts of life. For example, babies understand this concept when crawling towards their parents, and predators understand this notion when chasing their prey.  In engineering, we…
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Push for Electric Vehicle Infrastructure

There are over 1.8 million registered electric vehicles in the United States, a threefold increase from 2016. As electric vehicle (EV) batteries become lighter and the travel range increases, electric vehicles will become increasingly prevalent across the country. The rise in electric vehicles on our roadways has led to an increased demand for EV charging…
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Intern Spotlight – Ashton Moore

One of the goals of an internship is to give students hands-on experience in a particular industry. Since beginning her internship at Sain, Ashton Moore considers herself immersed in engineering. We sat down with Ashton to learn more about her Sain experience so far and discussed her plans for after this summer. Interning at Sain…
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Bicycle and Pedestrian Friendly Community

Bicycling is more than a practical, cost-effective solution to many municipal challenges. It’s an opportunity to make a community a vibrant destination for residents and visitors – a place where people don’t just live and work but an environment where everyone can appreciate the outdoors. Understanding bicycling and walking activity, preferences, and trends is critical…
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Big Data: Future of Transportation Studies

About a year ago, Sain published a blog discussing the use of big data as an alternative for traffic data collection during COVID-19. At that time, travel behavior changed, the number of vehicles on the roads had decreased, and peak hours were not the same when compared to pre-pandemic times. Since manually collecting reliable traffic…
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Superelevation – Know Your Transitions

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…
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The Anatomy of a Traffic Impact Study

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…
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Recap of 2020 and Looking Forward to 2021

A whirlwind of uncertainty landed on us in 2020, and we quickly learned how to adapt and be flexible. Although 2020 included a lot of the unknown, our team encountered several milestones throughout the year.  The most important highlight was adding a full-service branch office in Huntsville, Alabama. During 2020, our team attended award events…
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Roadway Safety: Lessons Learned from the COVID-19 Pandemic – Part 1 of 2

For several months, the COVID-19 pandemic has upended everyday routines and greatly impacted our health and economy. Typically, as economic activity declines, travel decreases, and the risk of being involved in a road collision also decreases. However, recent data from the National Safety Council (NSC) shows otherwise – emptier but riskier roads. Preliminary estimates from…
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