Traffic Engineering Internship
My name is Nicole Arellano, and I am studying Civil Engineering. When I was a kid, I used to think that there were tiny men sitting inside of the traffic signals, and they oversaw controlling the signals based on what they could see from inside of them. As I grew up, I realized that there is no way a man could be so tiny to fit inside a traffic signal. So, how are these traffic signals controlled, then?
I would later learn at my first internship as a Civil Engineering student, working for the Traffic Engineering Department at the City of Memphis, that my theory as a child was not too far off! No, tiny men don’t exist, but the technology that can control traffic signals based on what it “sees” does exist. In Memphis, some traffic signals are designed with detection systems that can read how much traffic it needs to let through before it changes phases to let the opposing traffic go through. There are different types of detection because each intersection is unique. An intersection will usually be studied by drawing out a diagram of types of crashes that happen at the intersection to determine how the intersection can be revised to be as safe as possible. Signal design and timing play a vital role in ensuring the safety of drivers and pedestrians, as well as efficiency, but signage and striping are also crucial to the overall design of an intersection and stretch of roadway.
Striping and signage often go hand-in-hand. How do you distinguish which lane to stay in so that you’re not crossing over into someone else’s space while driving? There are painted lines on the road that guide you! Those paint marks on the road are referred to as striping. Along with striping, signage needs to be put up that communicates information that you will need to know in order to make your driving experience safer. The hardworking staff at the “Sign Shop” and the “Signal Shop” bring to life the designs that are approved by the head of the Traffic Engineering Department and the City Engineer. Once these designs are approved, the shops are involved in installing and maintaining the signals, striping, and signage, so communication between them and the traffic engineers is important.
Working under many experienced and talented colleagues at the City of Memphis, there is always more to learn! This internship has taught me that there is more than what the eye sees when it comes to controlling traffic efficiently, and most importantly, safely.
“Sign Shop,” where the signs are made. They also install the signs and do the striping based on plans the Engineering sector of the City of Memphis approves.
Traffic Signals Awaiting Maintenance at the “Signal Shop.” They are a lot bigger when you are standing right next to them than what they seem to look like when they are installed!
