CHAIRPERSON
Well then if you could put it to him, but for the witness to express an opinion what may or may not happen at a road block isn't very relevant but what you are stating may well be relevant, so if you could put it to him, rather than spend a lot of time finding out what the witness thinks might happen at a road block.  Just put it to him, what will happen at a road block and put the version and see what the witness says about it.