Roman Mars has built one of podcasting's great empires out of noticing things everyone else walks past. His show, 99% Invisible, has racked up over 500 million downloads telling stories about the unnoticed design choices that quietly shape how cities and objects work, from speed bump psychology and flag design to the shape of a good street sign. His TED Talk on vexillology (the study of flags) is so influential that it has reportedly spurred 250 to 300 municipal flag redesigns across the country, including in Pocatello, Idaho, a city he once publicly called out for having the worst flag in America. Tyler asked questions about nearly every visual surface of modern life, and Mars's answers keep circling back to the same tension: beauty and efficiency are often at odds, and most of what looks ugly to us is just a compromise we haven't yet learned to love. Tyler and Roman discuss street signs, why classic cars were so much more distinctive than today's SUVs, Waymos, New Jersey jughandles, yellow streetlights, lane-stripe colors, why Houston keeps growing despite its lack of charm, whether any post-war American suburb is actually beautiful, the Chrysler Building's rocky reception, brutalism done right and wrong, Central Park as an urban miracle, what Jane Jacobs got wrong, e-bike lanes, Tokyo's bike-free transit model, the placelessness of global coffee shops, why the iPhone looks boring now, the ugliest country he's visited, his love for Australia's polymer notes, his soft spot for the dollar's "locked in amber" weirdness, underground power lines, how to warn future civilizations about nuclear waste, why highway signs lie to you about speed limits, the principles of a great city flag, the Pocatello redesign saga, his own studio, why 99% Invisible works precisely because it's audio-only, the most unusual habit behind his long productive career, and more. Read a <a href= "https://conversationswithtyler.com/episodes/roman-mars/">transcript</a> enhanced with helpful links, or watch the <a href= "https://youtu.be/TZdoYBGUBYI">full video</a> on YouTube. Recorded August 28th, 2026. Other ways to connect <ul class="dIYekRGT_0ZS9Tag_LeS"> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text">Follow us on <a href= "https://x.com/cowenconvos">X</a> and <a href= "https://www.instagram.com/cowenconvos/?hl=en">Instagram</a></li> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text">Follow <a href= "https://x.com/tylercowen">Tyler</a> on X</li> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text">Follow <a href= "https://x.com/romanmars">Roman</a> on X</li> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text"><a href= "https://mercatus.tfaforms.net/5060931">Sign up for our newsletter</a></li> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text">Join our <a href= "https://discord.com/invite/JAVWP7vTxt">Discord</a></li> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text">Email us: <a href= "mailto:cowenconvos@mercatus.gmu.edu">cowenconvos@mercatus.gmu.edu</a> </li> <li class= "e-10750-text encore-text-body-medium encore-internal-color-text-subdued _G3k1eIg6LFgvvq0Lxhg" data-encore-id="text">Learn more about Conversations with Tyler and other Mercatus Center podcasts <a href= "https://www.mercatus.org/podcasts">here</a>.</li> </ul> Timestamps: 00:00:00 - Intro 00:01:08 - On urban and suburban design 00:21:55 - On phone design 00:24:36 - On the world's ugliest places 00:26:03 - On currency design 00:28:33 - On power lines, speed bumps, and nuclear warning signs 00:34:31 - On city flags 00:40:39 - On building 99% Invisible 00:45:06 - Outro

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