I just had a question about the assumptions behind these times....
I don't live in the Kendall/Laurieton/Bonny Hills area but I do live in a regional area similar to them. Your time estimates seemed to be based around average speeds of 40km/hr which does seem quite slow for a regional area with barely any traffic lights or traffic. I would have expected the average speed to be closer to 80km/hr?
I live in the area, and I'd say the travel times are pretty close to accurate. Speed limits vary a lot in the area, and we can get quite a bit of traffic with tourists etc. Based on my experience, Laurieton to Kendall would be around 10 minutes, though with the highway lights in between this can be longer. Bonny Hills to Laurieton would be around 10 minutes by the quickest route. I haven't been to Dunbogan in years, so I couldn't tell you how long that trip takes.