Really? HP is 2 lanes wide (one way). It's not a bike trail. There's usually a very safe passing distance to be had where you shouldn't need advance notice. It's also so crowded that if I would never shut up if I had to call out to every person I passed. Also, everyone knows that on Thursday nights, there is a huge peloton speeding around and sprinting every lap, making it more crowded than usual. Ride as you would on any road and keep an ear out for others.