What is the construction for at Ainaloa?

[terracore]

I agree that the Ainaloa roundabout is tiny for it's intended use, but I don't understand the truck problem, is the right turn from Hilo traffic too much for the trucks to handle, but they can navigate it by using the same roundabout coming from the other direction? (?). What size trucks are we talking about?

Sorry, just confused, have never drove anything larger than a 26' U-Haul and that was bad enough.