So the fact that the 2 passerbys were not there at the first trial only the driver,can the statements from those witnesses be used at trial?

The witness that were not present were 2 passerbys who gave statements to the officer at the scene. Do they have to be present?
My defence is a page out of the drivers handbook about overtaking.
It states that once overtaken you must allow the overtaking vechile to pass. You cannot speed up.
That is my defence that the other car sped up as to prevent me from overtaking. The damage to my car is in the rear quater. There is no damage to his car.

I was involved in an accident. I was travelling west on Richmond at Spadina in the far left lane. After the intersection I indicated and changed lanes. There was a cab in the right lane. As I changed lanes our vehicles collided. Some witness came forward on his behalf and I was charged with unsafe lane change. There is no damage to his car and very little to mine. The first time I went to court his witness were not present. I rescheduled so my passenger could be present.
Do I have a chance?