I haven't seen many traffic portion tests so far - we may have one trial a year here, if that. I never thought about a dog barking at something, so didn't know if that is okay or not.
Both Keeta and Gryff did their BH under Doug Deacon, and so far he has always had us go somewhere busy away from the club grounds for the traffic portion test. With Keeta, we drove to a gas station/coffee shop/convenience store on the highway. It was a VERY busy spot. He had us walk around the parking lot and the gas pumps as cars came and went. One person was designated as the jogger and jogged past each dog. We walked by the main entrance of the store, with someone designated to open the door and walk out of the store as we went by. Off the side of the parking lot, he had us heel into a circle of people, sit our dog, and go around and shake hands with everyone. Then walking down a side street with the bicyclist going by, ringing the bell, and did the tieing up the dog and going out of sight, and had two or three dogs walk by - I was sure that Keeta was going to react to the dogs walking by, but she was so wondering what the heck was going on that she did not.
It was very informal, we were allowed to talk to our dogs, give repeat commands, help them for the sit, and so on. Keeta, without a prong and without a formal foos command, pulled like crazy while walking and that was okay too. I have often heard that Doug does a "good" BH.
Our club grounds is on Airport land, so for Gryffon's traffic portion, we went out to the main terminal, and did our traffic portion in front and around the main entrance. We get participants and spectators from the trial to come along and help in the traffic portion phase, and a group of people were instructed to stand in a group and talk loudly and excitedly. (some group members were acting a tad too excited, LOL). Again, we individually had to walk into the group, sit our dogs, and go around and shake hands and greet everyone. The rest of the test was similar to how Keeta's was set up.
Some of the passerby's stopped and watched, and really enjoyed the show. They were asking if this was a selection test for police dogs.
Other traffic portions I've seen and heard about were done on our club grounds - I've never heard or a dog failing the traffic portion test - I wonder if anyone has seen a dog fail the traffic portion, and what caused it to fail?
Wanted to add, when I had to hide out of sight for Gryff's test, I hid so well, they didn't know where I was, and I couldn't hear them calling me to come and pick Gryffon up - so that was pretty funny, joking about how I didn't want my dog anymore and someone else can take him. Like Lisa said, it's something fun to do with your dog, and a very informal test, have fun with it.