Watch this video ad-free on Nebula: https://nebula.tv/videos/not-just-bikes-the-wrong-way-to-set-speed-limits-st06 Speed limits are important to keep our roads and streets safe but how are they decided? And what happens when a speed limit is set too high or too low? There are right and wrong ways to set our speed limits, and design our streets, but unfortunately North American traffic planners are firmly stuck in the 20th century when it comes to building safe streets. To learn more about what's wrong with North American traffic engineering, check out the new book by Strong Towns founder Charles Marhon, "Confessions of a Recoving Engineer": https://www.confessions.engineer/ Watch the rest of my Strong Towns series here:    • Strong Towns   Sign up to Nebula and watch ad-free and sponsor-free: https://go.nebula.tv/notjustbikes Patreon: https://patreon.com/notjustbikes Twitter: https://twitter.com/notjustbikes Reddit: https://reddit.com/r/notjustbikes One-time donations: https://notjustbikes.com/donate NJB Live (my bicycle livestream channel): https://www.youtube.com/channel/UC9v57F4xz46KaDsvWfCv8yw --- References & Additional Reading Understanding the 85th Percentile Speed Strong Towns https://www.strongtowns.org/journal/2020/7/24/understanding-the-85th-percentile-speed ACCIDENTS ON MAIN RURAL HIGHWAYS RELATED TO SPEED, DRIVER, and VEHICLE https://www.ohiomemory.org/digital/collection/p267401ccp2/id/55 Road safety - Speed World Health Organization [WHO] https://www.who.int/violence_injury_prevention/publications/road_traffic/world_report/speed_en.pdf DRIVING SPEEDS AND PEDESTRIAN SAFETY https://trid.trb.org/view/365827 Literature review of pedestrian fatality risk as a function of car impact speed http://transportsafety.ir/wp-content/uploads/Courses/UrbanRoadsafety/Literature-review-of-pedestrian-fatality-risk-as-a-function-of-car-impact-speed.pdf Paris passe à 30 km/h lundi : les habitants de la capitale plutôt favorables https://www.leparisien.fr/societe/les-parisiens-plutot-favorables-a-la-limitation-de-la-vitesse-a-30-kmh-29-08-2021-YNSZEQ4RFVHGHLD6BPEEMXIPQM.php Gezicht in de Carnegiedreef te Utrecht. [1969] https://hetutrechtsarchief.nl/beeldmateriaal/detail/22e53839-19d0-5e6c-bc97-5d9ed09b1225/media/0a2be07b-15b1-ec18-417c-eda84f33e972 --- Chapters 0:00 Intro 0:07 Introduction to the 85th Percentile Speed 1:24 Streets vs. Roads 2:10 Where the 85th Percentile might make sense (roads) 2:38 Where the 85th Percentile doesn't make sense (streets) 3:44 Momentum kills 4:40 Signs are not enough (driving is subconscious) 5:49 Bad speed limits (city streets) 6:39 Bad speed limits (rural streets) 7:32 Confessions of a Recovering Engineer 7:52 How to make drivers slow down 8:18 Good slow street design 9:05 Safe speeds by design 9:35 OK Boomer 9:55 Conclusion 10:36 Patreon Shout-out 10:48 Outro