Frequently Asked Questions
How much CO2 does carpooling actually save?
Each gallon of gas burned emits about 8.89 kg of CO2. The EPA's average passenger vehicle emits 404 grams of CO2 per mile. With 4 carpoolers replacing 4 separate cars, three vehicles worth of emissions are avoided - typically 5,000-10,000 kg/year per shared route.
What is HOV lane access worth?
Carpool lanes in major US metros save 15-30 minutes per direction during peak hours. At $25/hr, that is $12.50-$25 daily in saved time per rider - often as valuable as the gas savings.
Do employers offer carpool incentives?
Many do: pre-tax commuter benefits, guaranteed ride-home programs, preferred parking, or direct subsidies. Federal pre-tax commuter benefits allow up to $315/month (2025) in tax-free commute spending.
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