So far the drivers I'm dealing with have been really courteous, but I did get very nervous when, as I was puffing up a hill, an oncoming car full of teenage boys slowed, a window rolled down, and a kid shouted at me -

"You can do it!"

As a newbie, I'm taking to heart the advice to be bold and firm about drivers noticing me. I'm a "nice girl" but I can emit a very South Philly "YO!" when needed.