The original highway was built with curves where they didn't need to be, so that military convoys could not be easily strafed by Japanese fighter aircraft. To emphasize the driving experience on the original very curved and sinuous highway, and for nostalgia I offer this bit of graffiti humour:

Winding in, and winding out,
Leaves my mind in serious doubt,
Whether the lout who built this route
Was going to hell, or coming out!

Last edited by castnblast; 09/03/20.