P3 North America just published their research concluding that “cost increase of integrated LTE/C-V2X module towards single TCU modules is relatively low in comparison to DSRC scenarios, resulting in decreased monetary impact on consumers” http://bit.ly/p3v2xpaper Also, ABI just published a blog indicating that "for many implementations C-V2X and 802.11p will have a comparable cost structure" and highlighted "the integration of C-V2X with the LTE modem, which would yield substantial cost advantages for C-V2X." Moreover, "C-V2X direct communications functions, as defined in 3GPP Release 14 published in 2017 provides longer range or higher reliability at the same range, as well as support for high speed use cases." https://www.abiresearch.com/blogs/c-v2x-technology-use-case/