Sorry, I should clarify my question regarding cost. You had indicated the renumbering a highway incurs costs in terms of signage, regulations, titles, address changes, etc. My question is weren't those same costs incurred when downloading occurred? I guess the benefit was lowered operating costs as outlined above, as opposed to nothing fundamentally changing if Hwy 17/417 was simply renumbered.
Ontario has 13 million residents, I'm sure we could afford the cost of switching the signs, but I think the point that cbeach was trying to make was about poor return return on investment.
As was indicated above, provincial highway downloading was done as a measure to remove provincial highway expenditures from the provincial balance sheet. It was done with little thought on how that would effect transferring the roads, and thereby changing the signs, would have on navigation for the traveling public. While the sky hasn't fallen since the highways were downloaded, navigation wasn't improved by the transfer of highways. In many cases, navigation is worse than it was before, as primary route numbers may have changed, and may no longer be consistent at regional boundaries, and there is now less of a hierarchy to the numbering system than there was before.
I'm sure the sky wouldn't fall if Hwy 17 was renumbered to Hwy 1 either, but it wouldn't improve navigation for anyone along the route, and could be confusing for people who choose to call the highway by its former number, or for mapping companies that aren't up to date. As you know, there is only one road between Ontario and Manitoba, so it's number isn't of great importance as there are no other roads that it could be confused with. If we were setting up a new route numbering system today, without having a nearly century old system ingrained in our collective minds I'd definitely agree with the merits of numbering 17 as 1. But as you know, this isn't the case. Renumbering Hwy 17 to Hwy 1 would look great on a map, but would offer no improvement to the route numbering system for any kind of trip along the highway. Renumbering it so it looks better on a map would be quite frankly a waste of money.