Slower than i was going from the obscures view behind the van, and my brake lights are on till I eventually passed the bus. I sure didnt slam on the breaks within the 1-2 meters from the front of the van as I couldnt even see what the van was stopping for. As posted below, I was a block away and saw the bus (should add the area before goes downhill slightly, and can see further ahead then when the road flattens out towars where the video takes place.)