OP here. You can disagree with my conclusions, but yes, Toyota's North American R&D Headquarters are near Detroit (in Ann Arbor) [1] and GM's research headquart

OP here. You can disagree with my conclusions, but yes, Toyota's North American R&D Headquarters are near Detroit (in Ann Arbor) [1] and GM's research headquarters are in Warren, MI, a suburb of Detroit. [1] https://www.toyota.com/usa/careers/research-development https://www.toyota.com/usa/careers/research-development [2] https://phmsociety.org/partner_profile/general-motors-global-rd/ https://phmsociety.org/partner_profile/general-motors-global...