content: Self driving cars can only look what is ahead of them. What is hidden behind an obstacle it does not take into account. Today I was blocked to drive up the street by parked big trucks.  How did I know when to hit the pedal? Because I could look down at the walkway see cars moving. So I counted the number of cars and remembered the colors and types. Then I counted until they passed me. Then I looked again, counted them until I saw a gap. Then waited for the car top pass and I hit the pedal.