Lorraine O'Connell is correct, however to expand on her answer both of your statements do mean the same thing, but we would probably say them like Lorraine O'Connell said.
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February 16, 2013
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Answered
Both sentences need a little work. I can't use the word "such" in the sentence without it sounding weird to me. I would word it like this:
"The buses should go at speed that would prevent pedestrian accidents."
You could use "which" instead of "that" in the sentence but that's how I would word it.
