Alternative Transport
The cheapest mile is the one you don't drive. That's true but glib, because for most people the alternatives are only realistic for a subset of trips, and the honest comparison is narrower than advocacy on either side suggests.
The guides here run that comparison properly. The key move is comparing against the true marginal cost of driving (fuel plus the wear, maintenance, and depreciation that mileage causes) rather than fuel alone, which understates driving by a wide margin. Done that way, short urban trips are where alternatives win most clearly, and they're also the trips where a car is least efficient, since a cold engine on a two-mile journey is close to its worst-case consumption.
Where it gets more interesting is partial substitution. Replacing a handful of trips a week is usually realistic where going car-free isn't, and it captures a surprising share of the benefit without requiring anyone to restructure their life. E-bikes in particular change the calculation for commutes previously considered too long or too hilly. The comparisons below include upfront costs and realistic break-even points rather than assuming the switch is free.
Start here
The best entry points if you’re new to this topic.
Bike vs Car Commute Cost: How Much You Save by Cycling
Biking a 10-mile one-way commute instead of driving saves about $3,000 a year in full vehicle costs. See the complete bike vs. car cost comparison.
Public Transit vs Driving: A Real Cost Comparison for 2026
Transit vs. driving costs for U.S. commuters in 2026: true driving costs, city-by-city transit pass prices, employer benefits, and when each option wins.
E-Bikes vs. Cars for Short Trips: How Much Gas You Save
The real annual savings from substituting an e-bike for short car trips, including full vehicle cost analysis and the second-car elimination scenario.
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Tools for this topic
Put these guides to work with your own numbers.