Look Both Ways with David & Wes
Pragmatic conversations about all things transportation, with Wes Marshall & David Zipper. If it moves on the road or on tracks, it's fair game.
Recent Topics
Episode 32: Gas Prices + Who Really Pays for Our Roads?
Gas Prices - David & Wes talk about high gas prices and whether the changes they prompt will stick. Some people try transit or bicycling. Others start shopping for an EV or a hybrid. But what happens when gas gets cheaper again? The conversation then turns to the shrinking value of fuel taxes as well as a question that many people think they already know the answer to: who pays for our roads? Sure drivers contribute through gas taxes, tolls, and fees, but that doesn't come close to …
Episode 31: Climate Week, Waymo + Is There a Role for Regional Rail?
Climate + Transportation - David & Wes kick things off with a good conversation about the irony of Waymo sponsoring Climate Week events. Electric robotaxis may be cleaner than gas-powered car trips, but that does not mean they help the bigger cause. The harder questions are about what kinds of trips they replace, whether they create new vehicle miles, and whether AVs reduce driving or simply make car travel easier to justify. From there, the discussion turns to regional rail and the role…
Episode 30: Speed Limits + Should Robotaxis Have to Follow the Law?
Speed Limits - David & Wes talk about speed limits: what they can do, what they can’t do, and the surprisingly complicated question of how robotaxis should handle them. Japan is moving toward lower speed limits on a large share of its roads, shifting many streets from 60 km/h to 30 km/h. That sounds simple enough, but speed is never just the number on the sign. It looks different from behind the windshield, in the crosswalk, inside a traffic study, or at the moment of impact. From there,…
Episode 29: Older Drivers + Who Wants to Drive Forever?
Senior Mobility - David & Wes talk about older drivers, road safety, and the uneasy idea of “driving forever.” Wes starts with a paper he co-authored about how people think about driving, aging, and the possibility that they may someday need to give up the keys. But the point is not just what happens when someone can no longer drive; it is what happens before that. David then talks about visiting his parents’ retirement community, where slow streets, golf carts, and walkable destinations…
Episode 28: The Global Road Safety Gap + Why the U.S. Is Falling Behind
Global Road Safety - David & Wes take a global view of road safety and ask why the United States keeps falling behind. They start with the U.S. being the only country to vote against a United Nations road safety declaration, then turn to a more uncomfortable comparison: the U.S. now appears to have a worse per-capita road fatality rate than Russia. From there, they look at the widening global road safety gap, including countries that once had worse safety records than the U.S. but have s…
Episode 27: The Federal Transit Funding Freeze-Out + Bike Lanes Under Threat
Transit Funding Freeze - David & Wes dig into our frozen federal transit funding situation and what happens when major transit projects are not officially killed, but also are not allowed to move forward. After new reporting on the Trump administration’s apparent halt in final agreements for Capital Investment Grants, they talk about what these delays mean, why stalled transit funding makes projects more expensive, and the hard reality that cities can no longer assume the federal governm…
Episode 26: Tire Pollution Is Not Just a Salmon Problem + The Takes We’re Taking Back
Tire Pollution - David & Wes look at tire pollution and why the harms may be broader than most people realize. What started as a story about 6PPD-Q washing into streams and devastating coho salmon is now raising new questions about human health, including a recent study linking tire-related pollution to Alzheimer’s-related pathways. They talk through what we know, what we still do not know, and why tire wear should be part of the transportation pollution conversation, even in a world wit…
Episode 25: How Stressful Is Your Bike Ride? + Bike Lane Camera Enforcement
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, and why better bike safety analysis depends on measuring the full route, not just the links be…
Episode 24: Crash Data Blind Spots + Who Gets to Use Public Roads?
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-collected crash data can turn a partial record into something that looks more complete than it really is…
Episode 23: World Cup Transportation Culture Shock + Safety Rituals That Stop Making Sense
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 conversation about what happens when the world arrives expecting world-class mobility and instead encoun…