The issue has been with us since the mid-1980s, when a complete plan for a shortening of the route across the Dornoch Firth and Strath Fleet was envisaged by British Rail. However, when European money had been made available, that was stopped at the last minute by the then Conservative Government and the plan was not carried through. That would have—and still could—cut 45 minutes off the journey from the north to Inverness. I defy anybody to take the journey from Inverness to Caithness and not agree that it is an outstanding problem that should be on the conscience of generations of politicians.In the past, a social case has always been made for the route. However, after reviewing the minister's remarks, I think that if we look at transport in isolation—Scottish transport appraisal guidance is such that we think just about the known facts at the particular time when such appraisals are made—we might miss the point that some of the major strategic developments in Scotland's economy will take place at the end of that line. I am thinking about renewable energy—tidal power—in particular, for which there might be £2 billion to £4 billion of investment in the next 10 to 15 years. The route will also service the west Shetland oil and gas basin from Scrabster harbour, and it may need to carry large amounts of timber. There is also the Scapa Flow deep-sea container development and, indeed, the scope for increased supermarket traffic, although there are now more supermarkets than we require.In that light, I think that to close the petition just because the minister thinks that the case has not been made to justify the cost of upgrading those rail services would be to kick the issue into the long grass once again.It is a problem for us that petitions must come to some sort of conclusion. My concern is that if—as the committee's papers suggest we should—we look at this in terms of the strategic projects review, we need to have a clear idea that the Government sees the route, which is numbered 236 on the European strategic routes map, as a priority. There are many other priorities. The big problem for most people is that there is a small population in the area and it sounds as though a lot of money is being sought. That has skewed people's thinking away from seeing the route as strategic at all. I am concerned that there are no clear guarantees in the strategic projects review that will allow us to take on board this major rail link. I therefore ask members to think about that.I also believe that, as growth in the Caithness economy gets under way—next Monday, the First Minister will address the Caithness regeneration conference and there will be a workshop on transport links—people will try to put figures to the costs of improving the airport's radar and upgrading the harbours, as well as to the costs of the rail and road changes that must take place. However, taken as a whole, the investment that is required is a fraction of what is going to be spent on other forms of development in the near future.My plea is for members to recognise that we have the opportunity to find some way to include the route directly—with specific wording—in the strategic transport projects review note from the committee. Many local people, including organisations in Caithness, have put a lot of money into getting professional studies done that show some of the benefits. Perhaps if more money had been available, we might have been able to look at some of the greater cost-saving elements—for example, whether the road bridge across the Dornoch firth has the structural capacity to enable it to carry passenger trains. That is one suggestion that people might have been able to consider, which could have reduced the costs of the project considerably.There are too many items that are pertinent to the future economy of the north for us not to have a clear view about how the aims of the petition can be pursued specifically. I am therefore concerned about closing the petition and leaving the subject to the mercy of the strategic transport projects review. If we did that, I would be unhappy, and many people in the north—few as they may be as a proportion of the total Scottish population—would ask whether the Parliament was really interested in such strategic developments and was making a statement to the minister, who merely describes discussions among officials that I would say show prejudice against any development, which we saw in the e-mail traffic that we analysed when we previously considered the petition. It would be best to step back and consider how we should include some of the petition's potential in the transport projects review, because I do not believe that the Government will spend money on examining the proposal in detail unless it is part of a wider transport projects review.