Maven is a carsharing service announced by General Motors in January 2016.
https://en.wikipedia.org/wiki/Maven_(car_sharing)
Yahoo! seems to think it's alive...
https://beta.finance.yahoo.com/news/gm-fighting-back-silicon-valley-105043398.htmlDO WE KNOW ANYONE WHO HAS USED THIS IN
Denver, Boston, San Francisco, Los Angeles, Ann Arbor, Chicago, Washington, D.C., Orlando, Jersey City, Atlanta