Thank you, Mr. Chairman. The principle of dust control was established many years ago in terms of an objective to make all of our gravel surfaces on the highway system dust-free. That is the primary objective. Over the years, we have increased the amount of dust-free surface. At this stage, the criteria that is used is based on traffic volume. The hope is, of course, that we could find additional funds to treat the entire system. However, we have set a limit right now that we can afford with the system.
In terms of the scientific reasoning for 50, it is not hard science by any means. It is a case of a set criteria on a lower traffic volume level. The systems we look at, we assess in terms of how they perform. So those lower traffic areas are looked at by our highway maintenance staff in the field. If it is determined that there is a serious problem, of course that is raised and we will pursue that further. Thank you, Mr. Chairman.