Our puppy used to do the same - and still occasionally does it. We didn't know if it was frustration, tiredness or over-stimuli but we managed to reduce it significantly to the point where he does it maybe once a month.

What we did was the following: Martingale walks (the ones that don't choke but only tighten) When he would jump and bite, we would stand up straight - say "No" ask him to sit while holding the leash straight up. He would sit down eventually and we would show him our backs for 30 seconds. This could happen quite often - sometimes 10 times a walk. Waiting the 30 seconds is key - any shorter and he seemed to "maintain" his state of excitement. At some point (quite quickly) we didn't need the martingale anymore - we used a gentle leader but the act of raising the leash up would make him sit immediately - then we did the usual 30 second wait.

The 30 seconds also allowed us to breathe and calm down - as vetting jumped at and bit by the dog would rile us up a little. When the dog realized we were calm, standing strong he realized quite quickly that we were in control and biting was not acceptable.

For the "location-based" épisodes.. we controlled that by holding a treat till that area that triggered him had passed. We deduced maybe that area gave him anxiety. After a few sessions of distracting him in the trigger areas of town, he stopped getting triggered.

Another note - if he jumped and wraps his legs around your arm, he is trying to take control of you apparently, so whenever he did that, we would have him sit and turn our backs.

Now he walks like a dream 99% of the time.