I had a little help catching the 502 at University and Queen yesterday on my way home. I saw the east-bound bus waiting at the light, but I was on the wrong side of University. So I ran up to Queen, then started running along Queen. Suddenly I heard that female TTC voice say, "502. Downtowner."
Turning to the street, I saw the driver cruising to a stop with the door open. He was pulling over for me!