Wes Marshall & David Zipper

Look Both Ways with David & Wes

Science EN ↓ 27 episodes

Wes Marshall & David Zipper explain how we travel and debate ways to do it better. Transportation research will be discussed, policies dissected, and favorite drinks shared. If it involves moving on a road or on tracks, it’s fair game – from autonomous vehicles to bikes to street design.

Author

Wes Marshall & David Zipper

Category

Science

Podcast website

lookbothwayspod.podbean.com

Latest episode

Jul 9, 2026

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Episodes

Episode 25: How Stressful Is Your Bike Ride? + Bike Lane Camera Enforcement 09.07.2026

Bike Stress - David & Wes talk about bike route stress and a major blind spot in the existing Level of Traffic Stress method: intersections. The current approach does a good job rating street segments, but it largely ignores exactly where a route can become far more stressful in real life. David & Wes discuss a new survey designed to help fix that gap by bringing intersections into the mix...

Episode 24: Crash Data Blind Spots + Who Gets to Use Public Roads? 25.06.2026

Crash Data Blind Spots - David & Wes dig into crash data and why Americans may know less about road deaths than we think. Everyone says they want data-driven safety policy, but the data we rely on often miss major categories of harm, including crashes on private property, parking lots, driveways, and behind gates. They talk through what gets counted, what gets left out, and why police-collecte...

Episode 23: World Cup Transportation Culture Shock + Safety Rituals That Stop Making Sense 11.06.2026

The World Cup - David & Wes mark the start of the World Cup by talking about the transportation culture shock many international visitors may experience in the United States. From stadium access to transit service to the everyday assumptions baked into how we move people around big events, they discuss why hosting a global event can expose the gaps in our transportation system. It’s a conversa...

Episode 22: The Gas Tax Holiday Trap + How Singapore & Fargo Price Transportation 28.05.2026

Gas Tax Holiday - David & Wes take on gas tax holidays and why cutting a few cents from the price of gas is usually better politics than transportation policy. The federal gas tax has been stuck at 18.4 cents per gallon since 1993, and suspending it would barely make a dent in a fill-up while weakening a transportation funding system that is already running on fumes. They talk through who actu...

Episode 21: The Car Industry + What Our Vehicles Say About Us 14.05.2026

The Car Industry - David & Wes drive straight into the changing car industry and what today’s vehicles reveal about identity, status, and the future of transportation. From cheap Chinese EVs showing up near the U.S. border to the pressure they could place on Detroit, they explore whether companies like BYD and Geely could bring back the affordable car in America and why U.S. automakers may str...

BONUS EPISODE: “Freedom to Drive” + Everyone Deserves Sidewalks (Live from Denver) 30.04.2026

Freedom to Drive - In this very special episode of Look Both Ways recorded in front of a live audience on a rooftop in Denver, Jill Locantore of the Denver Streets Partnership joins David & Wes to dig into the Trump Administration’s “Freedom to Drive” initiative and what it says about how we think about congestion, mobility, and who the transportation system is really for. They contrast that n...

Episode 20: Driver Assistance Isn’t Making Us Safer + Shrinking 16.04.2026

Driver Assistance – David & Wes dig into driver assistance systems and the question of whether they’re actually making our roads safer. Following a recent NTSB hearing, they explore both the promise and the problems, from real potential safety benefits to the very real ways these systems can encourage overtrust. They talk through how “hands-off” can become “mind-off,” why supervising automatio...

Episode 19: Pedestrian Deaths are Finally Dropping? + Johnny Transportation Comes to Town 02.04.2026

Pedestrian Deaths – David & Wes dig into a surprising shift in pedestrian safety and ask a harder question: are streets actually getting safer, or are we just seeing a temporary drop in risk? After years of rising fatalities, recent numbers suggest a modest improvement, but the pattern is anything but consistent. They explore whether this reflects real progress from design changes and enforcem...

Episode 18: The Upside of High Gas Prices + 190 MPH down Pennsylvania Avenue 19.03.2026

Gas Prices – David & Wes dig into the upside of high gas prices and why the story is more nuanced than it often seems. While rising costs at the pump can create real challenges, they also explore how higher prices can make other modes more attractive, reinforce location efficiency, and shift how people think about transportation more broadly. It’s a conversation about how gas prices shape beha...

Episode 17: The Big Ol’ Mailbag Episode + David’s Forthcoming Book! 05.03.2026

Mailbag! – David & Wes take listener questions on any and all things transportation. Before doing so, they talk about why David is at the Northwestern Transportation Library. The answer? He’s writing a book about congestion pricing called The Price of Traffic. Other topics include: 🔹 Sovereignty Implications of Cars 🔹 Bentley’s Law 🔹 Headlights 🔹 Insurance Companies Subsidizing Rural AVs...

BONUS EPISODE: Live on Stage at the 2026 Safe Roads Summit in Ft. Lauderdale with Greg Stuart 02.03.2026

Florida Men – David & Wes venture down to Fort Lauderdale for the 2026 Safe Roads Summit. After their respective talks, they jump on stage to record a live podcast episode with Broward MPO Executive Director, Greg Stuart. Topics include: 🔹 The Brightline Train Destroying a Delivery Robot 🔹 The Long History of Unsafe Streets in Florida 🔹 Managed Lanes Moving from Nonstarter to Normal Additio...

Episode 16: The Future (& Past) of Rural Transportation + The War on Bikes 19.02.2026

Rural AVs – David & Wes take a deep dive into the future of rural transportation and why mobility challenges outside our cities deserve far more attention. From David’s experience trying to get around West Virginia to Wes’ take on “rural urbanism” and the awesomeness of some rural Main Streets, they explore what rural villages get right, where and why rural areas struggle, and how autonomous v...

Episode 15: The High Cost of Parking Meters + Devaluing that Asset (Taylor’s Version) 05.02.2026

Parking Meters – David & Wes unpack the recent multi-billion-dollar resale of Chicago’s parking meter lease and why it matters. They explain the contract, including the compensation clause, and how it continues to hamstring Chicago’s ability to improve transportation. They also explore the less-discussed reality that some good has come from the deal such as a city that actually charges market...

Episode 14: The Great Autonomous Vehicle Debate + David Under Fire 22.01.2026

AV Safety – David & Wes explain why an online kerfuffle about autonomous vehicle safety unexpectedly put David himself in the spotlight. They unpack why autonomous vehicle debates so often generate more noise than insight, how narratives take on a life of their own, and what cities should be paying attention to right now. Listeners will come away with a clear sense of where autonomous vehicles...

Episode 13: Lessons From a Robotaxi Meltdown + How We Bike All Winter (or Not) 08.01.2026

Robotaxi Meltdown – David & Wes discuss how robotaxis affect urban resilience after a blackout brought mayhem to San Francisco’s streets. As robotaxis expand in cities across the United States and Europe, how will they react to emergencies and unforeseen events? If autonomous vehicles freeze en masse, transportation networks could grind to a halt. Other topics: 🔹 The quiet power of city sidew...

Episode 12: The End of Year Extravaganza! 16.12.2025

End of Year Extravaganza – David & Wes toss the usual format aside to look back at the transportation stories that defined 2025. From policies and headlines that made them hopeful to moments that were equal parts absurd and infuriating, they reflect on what the past year revealed about the state of streets, transit, and transportation more broadly. Listeners will come away with a clearer sense...

Episode 11: Cities Pushing Back on Waymo + Our Most Memorable Road Trips 05.12.2025

Waymo in Cities – David & Wes explore why cities are beginning to push back on Waymo and other robotaxi companies, and what that resistance reveals about local control, safety, and trust in emerging technologies. Using Boston’s response as a case study, they dig into the tensions between innovation narratives and municipal responsibility. Listeners will come away with a clearer understanding o...

Episode 10: What Happens When We Defund Transit + Rethinking Access 21.11.2025

Defunding Transit – David & Wes examine the growing efforts to defund transit through mechanisms like the Highway Trust Fund. What happens when transit funding is threatened and slowly hollowed out? Rather than treating these moves as abstract budget debates, they focus on the real-world consequences for reliability, coverage, and who gets left behind.  Today, we also talk about: 🔹 How we lea...

Episode 9: The New New York City Transportation Agenda + Back to the Future 13.11.2025

New York City – David & Wes break down Mamdani's New York City’s new transportation agenda and & the priorities it elevates and avoids. We examine how political vision, implementation, and street-level realities align or clash... and what all this signals about where cities may be headed next. Listeners will come away with a clearer sense of what’s genuinely new in the agenda, what feels r...

Episode 8: The Hidden Harm of Traffic Noise + Advice for a Young Engineer 21.10.2025

Traffic Noise – David & Wes dig into traffic noise as an overlooked public health problem and a quiet but pervasive form of harm in cities. Moving beyond annoyance, we explore how constant exposure to noise affects health, equity, and quality of life, and why it remains largely invisible in transportation decision-making. Listeners will come away with a better understanding of why noise matter...

Episode 7: Transit Funding Failures + Learning to Drive 08.10.2025

Transit Funding – David & Wes dive into the growing threats to U.S. transit funding and why they matter far beyond agency balance sheets. By looking at how federal decisions shape what cities can build and operate, they unpack why transit in the United States costs so much, delivers so little, and remains perpetually vulnerable to political whims. Listeners will come away with a clearer unders...

Episode 6: How Cities Should Prepare for Robotaxis + Old Bike Fights That Won’t Die 24.09.2025

Robotaxis – David & Wes look ahead to the arrival of robotaxis and what cities should be doing (or not doing) to prepare. Rather than asking whether autonomous vehicles will “work,” they focus on the decisions cities actually control. Listeners will come away with a clearer sense of why waiting for technology to mature is not a plan, and how today’s choices could lock in decades of consequence...

Episode 5: Traffic Cameras are More Popular than You Think + Our First Times (Riding Transit) 12.09.2025

Traffic Cameras – David & Wes take a closer look at traffic cameras and why they consistently poll better than most people expect. Rather than treating automated enforcement as a political third rail, they explore what the data actually show about public support, behavior change, and safety outcomes. Listeners will come away with a clearer understanding of why traffic cameras succeed where man...

Episode 4: Rainbow Crosswalks Aren’t the Problem + Why U.S. Road Safety Is 26.08.2025

Rainbow Crosswalks – David & Wes respond to the backlash against rainbow crosswalks and ask a more fundamental question: why are symbolic safety treatments (that have proven to help_ getting blamed for crashes instead of the underlying designs that put people at risk? Using recent controversies as a starting point, they unpack how U.S. road safety debates often focus on visibility and culture...

Episode 3: Tesla Autopilot on Trial + Why We Don’t Buy the Hype 14.08.2025

Tesla Autopilot – David & Wes unpack the implications of Tesla’s Autopilot being put on trial and ask what accountability for automated driving systems could or should look like. As tech companies promise to solve road safety, this conversation asks the harder questions. When technology fails, who bears responsibility, and who pays the price? We then examine why expensive hype-driven approache...

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