I have decided I want to walk the Corrieyairack pass, but it's ten miles long and climbs to over 2,500 feet at the watershed, which is probably a bit more than I care to chew. However, at the eastern end I think you can get a car as far as Melgarve, which is already at 1,170 feet to start with, which leaves only 1,330 feet to climb. Also, the watershed is only about three and a half miles on from Melgarve. That sounds doable, I could cope with getting to the watershed and maybe a little bit past before I turn back, but I will probably wait for longer days to tackle it.
If I have to walk in from Garva Bridge rather than being able to take the car to Melgarve that more than doubles the length of the walk, although it only adds another 180 feet to the height of the climb. In that case I'm definitely going to wait for long days and better weather. The only way to find out how far you can actually take a car along there is to go and look though. I think. I only know that people are "advised against" taking motor vehicles over the actual pass, which I wouldn't dream of trying, but it suggests that that first bit might be reasonably drivable.