Yep, that's why V2X never took off. Everything has to have radio tags, and failed tags could easily cause deaths and catastrophic failures. No way that scales or even works at limited scale.

Lots of metro trains systems use a lunchbox sized wireless tags placed strategically in stations for redundant safety and precision braking control. Said train systems also goes down daily for rather extensive maintenance(cost justified by scale).

Few people knows what oils for cars is. No way they can readily transition into verifying electronic tag signal integrity reports for every individual traffic cones in the shed.