The indecisive bicyclist is a good test. The real test will be the poor driving skills of other drivers. I wonder how it handles these driving situations?
Other drivers texting or talking on the phone resulting in inconsistent speeds and weaving - sometimes to the point of swerving directly at other cars.
Cars running red lights or stop signs.
Extreme road conditions like black ice, flooded roads, or washed out roads.
Animals running into the road. I really wonder about this one. If the car doesn't have time to stop, will it drive off the road and hit a tree? What if there are animals and pedesterians in the area at the same time. Where will it decide to go?
Since they're testing in California, I guess they've taken this into account already.
http://colorlines.com/assets_c/2011/02/streetsigns-border_crossers_sandiego-thumb-250x167-2367.jpg
Once they have all those figured out, they should test the cars in Russia.
https://www.youtube.com/watch?v=gRWtf0000e0