You would do an "offset" when you got to the street. Ride next to the curb until you got to the first car. Stop, lock your front wheel, and move your bike away from the curb to a point where you can ride beyond the obstacle. When you pass the obstacle (maybe a row of cars), stop, lock your wheel, and move back to the curb.
A curved street is a bit harder. I try to ride on the curb itself, along the top, if at all possible. I use judgement to add a little bit of distance, depending on how far you did it, the amount of arc, etc., to try to get the measurement as close as possible.
Good luck!