[Chariot](https://www.chariot.com/ https://www.chariot.com/) has been around for a while and does exactly that. > In the SF Bay Area, rides are $3.80 during of

[Chariot](https://www.chariot.com/ https://www.chariot.com/) has been around for a while and does exactly that. > In the SF Bay Area, rides are $3.80 during off-peak hours, and are $5 during peak hours. I have no idea what their operations or financials look like, but they have survived for at least a few years, so the business model must be at least somewhat viable.