Earlier quoted context omitted.
You’re citing that concurrence again. While that concurrence supports your argument, it’s not binding legal precedent. Perhaps someday it will be, but not today.
No, that concurrence is referencing Katz's reasonable expectation of privacy standard, which is binding legal precedent.
Also, the court has still not subjected the specific question against the Katz test. If they did, they’d might agree that a person has a reasonable expectation of privacy in their public travels. On the other hand, they might not.
I think you should consult a local attorney, because you’re not really understanding what the legal impact of these cases is, and I think a deep discussion with an subject matter expert in person would improve your understanding a lot.