The City of San Jose recently issued a Request For Information "...from firms that can offer convincing solutions for grade-separated mass transit infrastructure and operations at significantly lower costs than traditional transit projects..." Links to some of the responses are provided below. It is rumored that all of the responses will soon be made public.
https://www.inist.org/library/2019-09-30.GTF.SanJose_DOT_RFI_response.pdf
https://www.inist.org/library/2019-09-30.JPods.SanJose_DOT_RFI_response.pdf
https://www.inist.org/library/2019-09-30.PCC.SanJose_DOT_RFI_response.pdf
https://www.inist.org/library/2019-09-30.SIU.SanJose_DOT_RFI_response.pdf
https://www.inist.org/library/2019-09-30.SpartanSuperway.SanJose_DOT_RFI_response.pdf
https://www.inist.org/library/2019-09-30.UIDC.SanJose_DOT_RFI_response.pdf