I live in a city of 5 million people and if I needed to get across town in a hurry I’d take my cargo bike, not my car.
My cargo bike usually beats the google maps car estimate by about 20%.
Take with a pinch of salt though, I can also see counter studies[3].
1. https://www.slideshare.net/JamesTate22/exposure-to-the-traff...
2. https://www.sciencedirect.com/science/article/abs/pii/S00489...
But modern cars usually have cabin filters, which, if good enough, well maintained, and leak-free, should result in a significant improvement. I know Tesla made it a marketing point for the Model X, but I believe all cars built in the last decade or two have at least some kind of filtration.
The roads are car-dominated and not very friendly to bike on. There are a few bike trails which are great, but they aren't well-connected to each other, so aren't useful unless there happens to be one exactly where you want to go.