Who invented the traffic signal?

Eli: Nia, I was sitting at a red light today and realized I have no idea who actually decided we needed these things. I mean, did someone just wake up one day and say, "Let's put colorful lights on a pole"?

Nia: It’s actually way more dramatic than that! Before signals, the streets were total chaos—horses, carriages, and pedestrians all fighting for space. In London, the very first gas-powered signal from 1868 actually exploded and injured the officer operating it!

Eli: Wait, it exploded? That's terrifying.

Nia: Right? It was a dangerous job. But the story really picks up with Garrett Morgan in Cleveland. He was a self-made inventor and one of the first Black citizens there to own a car. After witnessing a horrific crash between a car and a horse carriage, he knew something had to change.

Eli: So he’s the one who gave us the modern system?

Nia: He played a massive role, especially with safety. Let’s explore how his journey from a sixth-grade dropout to a prolific inventor changed the way we drive forever.

Nia: It really is a classic American story, Eli. Garrett Morgan was born in 1877 in Paris, Kentucky, just about a decade after the Civil War ended. His parents had been enslaved, and he was the seventh of eleven children. Imagine growing up in that environment—working on the family farm, knowing the world was changing but having very limited resources. He actually left home when he was only fourteen years old with almost nothing in his pockets.

Eli: Fourteen? I can’t even imagine moving to a new city alone at that age. Where did he head first?

Nia: He went to Cincinnati, Ohio. He found work as a handyman for a wealthy landowner. But here is the thing about Morgan—he was incredibly driven. Even though he had to drop out of school after the sixth grade to work, he used the money he earned as a handyman to hire a private tutor. He was basically homeschooling himself while working a full-time manual labor job.

Eli: That says so much about his character. He wasn't just looking for a paycheck—he was looking for an education.

Nia: Exactly. And that curiosity eventually led him to Cleveland in 1895. He got a job sweeping floors at a place called Roots and McBride Company. They were a dry goods enterprise, but they had all these sewing machines. Most people would just sweep around them, right? But Morgan started watching them. He started learning the inner workings—how the gears moved, how the needles timed out. He basically taught himself how to repair them just by observing and tinkering.

Eli: It’s like he had this natural mechanical intuition. Like he could see the "logic" in the machine.

Nia: He really did. He became so good at it that he didn't just stay a repairman. He started inventing. His very first patent was actually for a belt fastener for sewing machines. Think about the transition there—from a teenager sweeping floors to a patented inventor in just a few years. By 1907, he was confident enough to open his own sewing machine repair shop.

Eli: And this is in Cleveland, right? Which was a major industrial hub at the time.

Nia: Right! Cleveland was booming. In 1909, he and his wife, Mary Hasek—who was a skilled seamstress from Bavaria—expanded the business into the Morgan Skirt Factory. They had over thirty employees. Mary would handle the sewing and design, and Garrett would build and maintain all the machinery. It was this powerhouse partnership. But it was actually a mishap in that shop that led to his first real financial windfall.

Eli: Wait, a mishap? Like a mistake turned into a product?

Nia: Exactly. The sewing needles at the time moved so fast that they’d create friction and scorch the wool fabric. Morgan was trying to find a chemical polish to coat the needles and reduce that heat. One day, he wiped some of the extra liquid on a piece of cloth and noticed the fibers were suddenly standing perfectly straight.

Eli: No way. He discovered a hair straightener while trying to fix a sewing machine?

Nia: He did! He tested it on a neighbor’s dog first—a G.A. Morgan legend—and then he tried it on his own hair. It worked so well that he started the G.A. Morgan Hair Refining Company. That business became so profitable that it gave him the "runway," so to speak, to spend his time on much bigger problems—like public safety.

Eli: It’s fascinating how his business success wasn't the end goal. It was just the fuel for his next big idea.

Nia: And those ideas were always rooted in what he saw around him. He was a man who watched the world closely. Whether it was a scorched piece of fabric or a congested street corner, he saw a problem and immediately started drafting a mechanical solution in his head.

Eli: So, before he even gets to the traffic signal, he’s already a successful businessman and an inventor. But you mentioned something earlier about a "safety hood." Is that like an early gas mask?

Nia: It’s exactly that. Around 1911, there was this horrific tragedy in New York—the Triangle Shirtwaist Factory fire. 146 workers died, many because they couldn't breathe through the smoke. Morgan saw the news and was devastated. He realized that firefighters often couldn't get close enough to save people because the smoke was just too thick.

Eli: So he set out to solve the problem of smoke inhalation. How did his design actually work?

Nia: It was brilliant in its simplicity. He realized that during a fire, smoke and heat rise, but there’s often a layer of cleaner, cooler air right near the floor. So, his "safety hood" featured a long tube that hung down to the ground. The wearer would breathe the air from the floor level while the hood protected their eyes and face from the smoke.

Eli: That makes so much sense. It’s like a snorkel for a sea of smoke.

Nia: Precisely. He patented it in 1914 and started the National Safety Device Company. But here is where the story gets heavy with the reality of the time. Even though the device worked, Morgan had a hard time selling it to fire departments, especially in the South, because he was Black.

Eli: So even a life-saving invention was held back by the racism of the era?

Nia: Sadly, yes. But Morgan was a savvy entrepreneur. He actually hired a white actor to pretend to be the "inventor" during demonstrations. Morgan himself would dress up in a disguise—sometimes as a Native American character he called "Big Chief Mason"—and he would be the one to actually wear the mask and go into the smoke-filled tents to show it worked. He literally put his life on the line to prove his invention, all while having to hide his true identity just to make a sale.

Eli: That is incredible and heartbreaking at the same time. He had to play a "sidekick" to his own genius just to get the world to use it.

Nia: It really highlights his pragmatism. He cared more about the device saving lives than his own ego in that moment. And then came 1916—the Cleveland Waterworks explosion. This was the real-world test. They were digging a tunnel five miles out under Lake Erie, 120 feet below the surface. They hit a pocket of natural gas and—boom. An explosion trapped dozens of workers.

Eli: Oh man. I’m guessing the air in that tunnel was completely toxic?

Nia: It was a nightmare. Ten would-be rescuers went in and died from the fumes. The situation looked hopeless. Finally, in the middle of the night, someone remembered Garrett Morgan and his "breathing device." They called him at home. He and his brother, Frank, grabbed their safety hoods and rushed to the lake.

Eli: Did they actually go down there themselves?

Nia: They did. They put on the hoods and descended into that dark, gas-filled tunnel. They managed to pull out several survivors and recover the bodies of the others. It was a massive heroic feat. The next day, it was national news. But Eli—this is the frustrating part—many of the newspapers completely left Morgan’s name out of the story. Some reports even credited other people for the rescue.

Eli: After he was the one who actually had the technology and the guts to go down there? That’s infuriating.

Nia: It was. He was even nominated for a Carnegie Medal for bravery but was passed over. However, the word did get out among professionals. Fire departments all over the country started ordering the Morgan Safety Hood. It eventually became the blueprint for the gas masks used by soldiers in World War I.

Eli: So his invention literally went from a tunnel under Lake Erie to the trenches of Europe.

Nia: Exactly. And while the lack of recognition hurt his business in some circles—once people realized the inventor was Black, some canceled their orders—Morgan didn't stop. He used the profits from the safety hood to keep tinkering. And that’s what eventually led him to look at the chaos on the streets of Cleveland.

Eli: Okay, so we’ve got this man who’s a self-taught machinist, a successful hair-care mogul, and a literal life-saver. Now he’s driving around Cleveland in the early 1920s. What did the streets actually look like back then? Because I’m imagining it wasn't just cars.

Nia: It was a mess, Eli. Think about the transition period. You had the Ford Model T becoming affordable, so cars were flooding the streets. But people hadn't given up their horses yet. So you have horse-drawn delivery wagons, carriages, bicycles, streetcars on tracks, and pedestrians just darting across the road wherever they felt like it.

Eli: That sounds like a recipe for a disaster. Were there any rules at all?

Nia: Very few. Usually, a police officer would stand in the middle of a busy intersection and wave people through. Imagine doing that for eight hours a day in the rain or snow, with horses spooking and cars backfiring all around you. It was dangerous for the officers and confusing for the drivers.

Eli: I remember you mentioned that some early electric signals existed, like the one Lester Wire made in Salt Lake City in 1912.

Nia: Right, Lester Wire’s "birdcage" signal. It was a step forward, but it only had two settings: Stop and Go. Red and Green. And that was the problem. There was no transition. It would just flip from "Go" to "Stop" instantly.

Eli: I can see why that’s a problem. If you’re halfway through the intersection and it suddenly turns red, you’re stuck in the path of the cross-traffic that just got the green light.

Nia: Exactly. That’s exactly what Morgan witnessed. He was driving his own car—and remember, he was the first Black man in Cleveland to own one—when he saw a terrible collision at an intersection. A car and a horse-drawn carriage crashed, and a little girl was actually thrown from the carriage. It was a traumatic scene, and it stayed with him.

Eli: It seems like that’s the pattern for him. He sees a tragedy and his brain immediately goes into "engineering mode" to make sure it doesn't happen again.

Nia: He realized the "Stop-Go" system was fundamentally flawed because it didn't account for human reaction time or the physical space it takes to clear an intersection. He thought, "There needs to be a moment where everyone stops."

Eli: An "all-stop" phase?

Nia: Precisely. His design was a T-shaped pole with arms that could be moved to different positions. It had "Stop," "Go," and then a third position that signaled "Stop in all directions." When that third signal was up, every vehicle in every direction had to wait. This gave the pedestrians a chance to cross safely and allowed the cars that were already in the middle of the intersection to get to the other side before the cross-traffic started moving.

Eli: It’s essentially the conceptual birth of the yellow light. Even if it wasn't a "light" yet in his first version, it was that "caution" interval we rely on today.

Nia: That’s the key. He wasn't the very first person to put a light on a pole, but he was the one who recognized the necessity of the transition period. He patented this three-position signal in 1923. It was manually operated by a crank, but it was standardized. It took the guesswork out of the intersection.

Eli: And he didn't just stop at the US patent, right?

Nia: No, he was thinking globally. He got patents in Britain and Canada too. He knew that the "car revolution" wasn't just happening in Cleveland—it was going to change the world. He was looking at the infrastructure of the future.

Eli: It’s interesting because we often think of inventors as these guys in labs with beakers, but Morgan was an inventor of systems. He was looking at how a city breathes and moves.

Nia: And he was doing it as a citizen-driver. He knew what it felt like to be behind the wheel, worried about who was coming around the corner. He took that personal anxiety and turned it into a universal safety standard. It’s a perfect example of how lived experience informs the best design.

Eli: So Morgan has this patent for the three-position signal. Does he start a factory to build them, or does he go the same route he did with the hair products?

Nia: This time, he did something different. He realized that for this to truly become a standard, it needed the backing of a massive corporation with the reach to install it everywhere. In 1923, he sold the rights to his traffic signal patent to General Electric.

Eli: General Electric? That’s a huge name even today. Do we know how much he sold it for?

Nia: $40,000. Now, that might not sound like a billion-dollar tech exit today, but in 1923, that was a massive fortune. To give you some perspective, that’s over $700,000 in today’s money.

Eli: Wow. For a guy who started out as a handyman, that’s an incredible level of success.

Nia: It really was. And GE took his three-position concept and started developing the electric versions—the ones that eventually became the red-yellow-green lights we see on every corner. But it’s important to note, as we synthesize these stories, that Morgan wasn't the only one in the mix. There was a police officer in Detroit named William Potts who also worked on a three-light system around 1920.

Eli: Oh, so there was some "parallel invention" happening?

Nia: Definitely. Potts was a cop, so he saw the accidents from a law enforcement perspective. He actually used railroad signals as his inspiration, since trains had been using red, green, and yellow (or amber) for a while. But here is the catch—because Potts was a municipal employee, he actually wasn't allowed to patent his invention.

Eli: That’s a tough break. So he created the system but couldn't own the rights to it?

Nia: Exactly. Meanwhile, Morgan, as an independent entrepreneur, was able to secure those patents. That’s why Morgan’s name is the one we find in the history books and patent archives. His patent formalized the "caution" phase as a legal requirement for traffic control.

Eli: It’s like the difference between an idea and a standard. Morgan’s patent helped turn the idea of a caution light into a standard piece of infrastructure that a company like GE could sell to cities everywhere.

Nia: And think about the impact that had on the cities themselves. There’s this amazing stat from New York City in 1922. Once they started moving toward more automated and standardized traffic systems, they were able to reassign thousands of police officers. They went from needing 6,000 officers just to stand in intersections to needing only about 500 for traffic duty.

Eli: That’s a huge shift in resources! They saved something like twelve and a half million dollars and could put those officers back into the neighborhoods.

Nia: It’s the "hidden" benefit of invention. It’s not just about the light itself—it’s about the efficiency it brings to a whole society. Morgan’s "all-stop" idea didn't just save lives; it saved cities a fortune and allowed them to grow faster.

Eli: I’m curious, though—did Morgan get the credit he deserved during his lifetime for this? Or was it like the Lake Erie rescue where he was sidelined?

Nia: It was a bit of a mix. He was definitely respected in Cleveland as a wealthy businessman and a leader. But on the national stage, for a long time, his role was downplayed. It wasn't until much later—actually right before he died in 1963—that the U.S. government officially honored him for the traffic signal invention.

Eli: 1963? That’s forty years after the patent.

Nia: Yeah, he lived a long life, but it took a long time for the official recognition to catch up with the reality of his contribution. He died just a few months before the centennial celebration of the Emancipation Proclamation. He had been waiting to go to Chicago for that event. It’s poignant, really—he spent his life pushing the country forward, and he passed away just as the Civil Rights Movement was reaching a fever pitch.

Eli: It’s a powerful legacy. He wasn't just fixing machines; he was fixing the way we live together in a crowded world.

Nia: You know, Eli, what really strikes me about Garrett Morgan is that he didn't just stop at being an inventor. He was what we’d call today a "social entrepreneur." He used his wealth and his influence to lift up the entire Black community in Cleveland.

Eli: Right, you mentioned he started a newspaper?

Nia: Yeah, the *Cleveland Call*. He launched it in 1920, and it eventually became the *Call and Post*, one of the most influential Black newspapers in the country. He knew that for Black Americans to succeed, they needed a voice, a place to discuss issues that the mainstream white press just ignored.

Eli: So he was providing intellectual infrastructure while he was building physical infrastructure.

Nia: That’s a great way to put it! He was also a long-time member of the NAACP. He donated to historically Black colleges and universities. He even bought land in Wakeman, Ohio, and built a country club specifically for African Americans, because at the time, they were banned from most public recreation spots.

Eli: He was essentially building a parallel world where his community could thrive, despite the segregation of the time.

Nia: He really was. And he did all this while dealing with his own health struggles. In 1943, he started developing glaucoma and eventually lost most of his sight. Some people believe his health issues were actually tied to the toxins he inhaled during that Lake Erie tunnel rescue years earlier.

Eli: So he literally gave his health to save those workers, and then spent the rest of his life blind, still trying to improve the world?

Nia: It’s a testament to his resilience. Even in his later years, he was still inventing. His very last invention was a self-extinguishing cigarette. He saw house fires started by people falling asleep with a cigarette and thought, "There has to be a way to stop this." He designed a cigarette with a little water-filled pellet near the filter.

Eli: He just couldn't turn that brain off, could he?

Nia: Never. He died in July 1963 at the age of 86. And today, his legacy is finally being fully embraced. He was inducted into the National Inventors Hall of Fame in 2005. There’s a school of engineering and innovation named after him in Cleveland. Even Cuyahoga County recently declared March 4th—his birthday—as Garrett Morgan Day.

Eli: It’s about time. It’s fascinating how his story touches so many different parts of our lives—from the hair products people still use, to the gas masks that protect soldiers and firefighters, to every single time we wait at a yellow light.

Nia: And he did it all with a sixth-grade education and a refusal to be told "no." He called himself the "Black Edison," and honestly, the title fits. Like Edison, he saw the future before it arrived. But unlike Edison, he had to build that future while facing the constant headwinds of systemic racism.

Eli: It makes his achievements even more impressive. He didn't just invent a signal; he signaled a new way for an African American man to be a titan of industry and a hero of public safety.

Nia: Exactly. He proved that genius doesn't care about your pedigree or your skin color. It cares about solving the problem in front of you. And the problems he solved were the ones that kept us all alive and moving.

Eli: So, Nia, we’ve talked about Morgan and Potts, but how did we get from those early T-shaped poles and four-sided boxes to the standardized red-yellow-green we see today? It feels like something that just happened overnight, but I’m guessing it was a bit more gradual.

Nia: It was definitely a process of trial and error. Throughout the 1920s and 30s, cities were basically doing their own thing. You’d drive from one town to another and the signals might look totally different. Some had two lights, some had three, some used semaphores like Morgan’s. It was actually a bit of a nightmare for the first long-distance drivers.

Eli: I can imagine. If you don't know the "language" of the local traffic light, you’re bound to make a mistake.

Nia: Exactly. And that’s why standardization became the next big hurdle. In 1935, the Manual on Uniform Traffic Control Devices was published. This was the document that basically said, "Okay, everyone, we’re going with the three-color system." It officially adopted the red-yellow-green sequence as the national standard.

Eli: And they chose those colors because of the railroad influence?

Nia: Mostly, yes. Red for stop and green for go were already fairly well-established. But the yellow—the caution light—that was the game-changer. It’s what we call the "all-stop" or the "amber" phase. Its job is to provide that crucial transition period.

Eli: I was reading in one of the sources that the "all-stop" feature is what really prevents those sudden, jarring stops that cause rear-end collisions.

Nia: Right! It warns you to prepare to stop. It’s a psychological buffer as much as a physical one. And interestingly, while we use green, some places like Japan actually use a shade of blue for their "go" signal.

Eli: Wait, blue? Why blue?

Nia: It’s a fascinating linguistic quirk! In ancient Japanese, the word for "blue" and "green" was often the same. So when they first started installing traffic lights, they used a very blue-ish green. Eventually, it just became a cultural standard. But the principle is the same—three distinct signals for three distinct actions.

Eli: It’s funny how a simple color choice can become so ingrained in our brains. I don't even think "stop" when I see red; I just do it.

Nia: That’s the power of good design. It becomes invisible. You don't think about Garrett Morgan or William Potts when you’re driving to work, but you’re participating in a system they built. And it’s a system that has had a massive impact on urban planning. Think about how cities would look without them. We’d have to have much smaller intersections, or we’d just have constant gridlock.

Eli: Or we’d still have thousands of police officers standing in the middle of the street waving their arms.

Nia: Exactly. The automation of the traffic light was one of the biggest labor-saving inventions in the history of the modern city. It freed up human capital to do other things—like fight crime or respond to emergencies. It’s a ripple effect that started with a man seeing a carriage accident in Cleveland and thinking, "I can fix this."

Eli: It also makes you appreciate the yellow light more. I think a lot of us see it as a challenge—like, "Can I make it before it turns red?"—but its actual purpose is to keep the "cross-flow" from becoming a "collision-flow."

Nia: You’ve hit the nail on the head. That "all-stop" interval that Morgan championed is what allows the intersection to "breathe" before the next wave of traffic hits. It’s the pause that saves lives.

Eli: As we’ve been talking about Garrett Morgan’s life, I keep thinking about how much he achieved with so little "formal" support. No high school diploma, no engineering degree, and he’s facing massive social barriers. What are the big takeaways for us today from his story?

Nia: I think the first one is the power of observation. Morgan didn't invent things in a vacuum. He invented because he was looking at the world with a critical eye. He saw the friction on the sewing needle, the smoke in the factory, the chaos at the intersection. He was always asking, "Why is it this way, and how could it be better?"

Eli: It’s that "problem-solver" mindset. Instead of just complaining about the traffic, he built a signal.

Nia: Right! And the second takeaway is resilience. Think about the Lake Erie rescue. He does this incredible, heroic thing, and then he’s erased from the story and his business actually *suffers* because people find out he’s Black. Most people would have given up or become incredibly bitter. But Morgan just kept going. He sold his next patent to GE for a fortune and used that money to fund his community activism.

Eli: He used his success to create more opportunities for others. He wasn't just an inventor; he was a leader.

Nia: Absolutely. And I think there’s a lesson in his marketing savvy, too. He knew how to navigate a world that was stacked against him. Hiring that actor to demonstrate the safety hood? That was a brilliant, if frustrating, piece of strategy. He knew that the *goal*—getting the masks to the firefighters—was more important than his own face being on the poster.

Eli: It’s a lesson in pragmatism. Sometimes you have to work within a broken system to eventually fix it.

Nia: And he did fix it. He paved the way for generations of Black inventors who followed him. He showed that you could be a machinist, a chemist, an entrepreneur, and a journalist all at once. He didn't let anyone put him in a box.

Eli: I also love the mandatory Sunday night dinners he had with his three sons. It shows that despite all his fame and business success, he was a family man who valued education and connection. He made sure his kids had the opportunities he didn't have.

Nia: He was building a legacy in his home as much as in the streets. He invested heavily in his sons’ education because he knew that knowledge was the one thing no one could take away from them.

Eli: So, for everyone listening, maybe the next time you’re stuck at a long red light, instead of getting frustrated, take a second to look at that T-shaped pole. Think about Garrett Morgan and the fact that you’re sitting there safely because he decided to do something about a crash he saw a hundred years ago.

Nia: It really puts things in perspective. Innovation isn't always about the newest smartphone; sometimes it’s about the simple, reliable things that keep our society running smoothly every single day. Morgan’s life is a reminder that one person with a sixth-grade education and a lot of determination can literally change the way the entire world moves.

Eli: This has been such an eye-opening look at Garrett Morgan. But Nia, how do we take the spirit of his work and actually apply it to our own lives? Most of us aren't going to invent a new traffic signal tomorrow.

Nia: I think it starts with what I call "The Morgan Mindset." It’s about looking for the "scorch marks" in your own life. Remember how he found the hair straightener because he saw the sewing needles scorching the fabric? He didn't just ignore the problem or get annoyed by it. He looked closer.

Eli: So, identifying the friction points in our day-to-day routines.

Nia: Exactly. Whether it’s a process at work that feels clunky or a recurring problem in your community, don't just accept it as "the way things are." Ask yourself, "What is the mechanical cause of this, and what’s one small change that could fix it?" Morgan’s traffic signal started with the idea of just one extra position on a pole. It wasn't a total redesign of the road; it was a targeted fix for a specific danger.

Eli: That’s a great point. It’s about incremental, impactful changes. And what about the way he handled setbacks?

Nia: That’s the "Resilience Playbook." When Morgan faced discrimination, he didn't stop inventing. He pivoted. He found a different way to market his products. He sold his patent to a bigger player when he realized they could take it further than he could. For us, that means not being too precious about our ideas. If one path is blocked, find a side door. If you can't do it alone, find a partner or a corporation that can help you scale.

Eli: And maybe the most important part—the social aspect. He didn't just build wealth for himself. He built a newspaper, a country club, and supported the NAACP.

Nia: Right. The takeaway there is to "lift as you climb." Use your success to create infrastructure for others. If you’ve reached a certain level in your career, how can you be the "tutor" that Morgan had to hire for himself? How can you create a "newspaper" for voices that aren't being heard in your industry?

Eli: It’s about being a citizen-inventor. Using your skills for the common good.

Nia: Exactly. And finally, don't be afraid to be a "handyman." Morgan wasn't afraid to get his hands dirty, to sweep the floors, to repair the machines. He understood how things worked from the bottom up. In our digital age, we often lose that. But there’s so much power in truly understanding the "inner workings" of whatever field you’re in.

Eli: Whether it’s code, or a business model, or a physical machine. Know the gears.

Nia: Know the gears. And once you know them, you’ll start to see where they can be improved. That’s the legacy of the "Black Edison." He didn't wait for permission to innovate. He just saw a need and filled it.

Eli: I love that. It’s about taking ownership of the world around us. We aren't just passengers in this system; we’re the ones who can help steer it.

Nia: As we bring this to a close, I’m reflecting on how Garrett Morgan’s life ended. He passed away in 1963, just as a new era of American history was beginning. He lived long enough to see his "safety hoods" save thousands of soldiers and his traffic signals become the heartbeat of every city in the world.

Eli: It’s incredible to think that a man who was born into a world of horses and buggies died in the age of the jet engine and the early space race. And yet, his 1923 patent was still the foundation of it all.

Nia: It really shows that good design is timeless. Technology changes—we have sensors now, and AI-controlled traffic grids—but that three-color sequence, that "caution" interval, is still there. It’s a fundamental piece of human-centered engineering.

Eli: I’m left with this image of him and his brother descending into that dark tunnel under Lake Erie with their safety hoods on. It’s such a powerful symbol of what an inventor can be—not someone distant in a lab, but someone who runs *toward* the problem.

Nia: That’s the heart of it. He was a hero because he used his brain to protect other people's bodies. He turned his mechanical genius into a shield for his community and his country.

Eli: So, as you go about your day, we want you to think about the "hidden" inventors like Garrett Morgan. Think about the people who built the systems we take for granted. Is there a problem in your world that’s waiting for a "three-way signal" fix? Is there a way you can use your skills to make your community a little safer or a little more efficient?

Nia: Garrett Morgan’s story is a reminder that genius is everywhere, often in the places we least expect it. It’s in the handyman, the sewing machine repairman, the person who refuses to accept chaos as the status quo.

Eli: Thank you so much for joining us on this journey through early 20th-century Cleveland and the mind of a true visionary. It’s been a fascinating ride.

Nia: It really has. Take a moment today to appreciate the yellow lights in your life—those pauses that keep everything from crashing together. And maybe, in your own way, find a way to be a signal for someone else.

Eli: We hope this story leaves you feeling inspired to look at the world a little differently. Thanks for listening and for exploring the legacy of Garrett Morgan with us.

Nia: Take care of yourselves, and keep looking for those scorch marks. You never know what you might discover.