I wonder if you are in accident if the Insurance Company or the Police can demand to see the data pertaining to the incident?
Yes. The Ts&Cs - which a user will have agreed to in having the system - specifically allow Honda to pass data to law enforcement if requested. Unclear whether that requires some sort of warrant or court order, or if they can just do it, but they don’t have to ask the user’s permission because it’s already been given.
Not sure about insurance companies, but if they know this data exists and that having access to it might allow them to deny a claim, why wouldn’t they try to get it ? Just wait for “Sorry sir, your data shows you were doing 30mph in a 20mph zone so your insurance isn’t valid”. But then I’ve been accused of being paranoid ...