Truncked systems are not encrypted by default. Users can choose to encrypt some or all channels or talk groups.

You can get a new Uniden Scanner, enter in a zip code, and get all traffic including from the Stste DTRS system. You will not get any encrypted channels still though. Pretty sure you can get the MAC channels and Network First channels as well. I don't have one and have never tried but you should be able to as those channels are not encrypted.