I used to access some of the posted scanner sites - some you could listen to major cities and choose which police area you'd like to listen in - like traffic or ops or whatever. It's been a while but I think I found most of the sites by going to like BearCat Scanner links or Uniden Scanner links then following links from there. If I recall there is a scanner 'club' through Bearcat, I believe, that has many sites posted.

Good luck.