http://schema.org/Car
http://schema.org/Vehicle

A substantial and detailed proposal has been prepared by Martin Hepp, see associated pull request: #80

Announcement / discussion: http://lists.w3.org/Archives/Public/public-vocabs/2014Dec/0057.html

Original W3C wiki link https://www.w3.org/wiki/WebSchemas/Vehicles

See 2015-01-09 review from @tmarshbing which suggests amongst other things partitioning the proposal into smaller sections.

See also #263 for the property-value proposal, which supports the proposal.