I took a multi-tool with multiple blades on a carry-on during two flights within Canada. For both flights, I told security about it, they saw it on the luggage scan, and didn't care. Rules say each blade has to be no longer than 6 cm which mine were.

The rules also say to not take on carry-ons if you're traveling internationally.

As for ground transportation, I don't think anyone will care.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated