I can't help you with the mapping, but I wanted to second B. Carfree's comments re: picking a route from Eugene to the coast. I used to live near Crow, southwest of Eugene. Even back then, Highway 126 from Eugene to Florence was often very busy with traffic; I'm sure it worse now. I much preferred the ride up Wolf Creek/Smith River Roads to biking Highway 126. [Side note to B. Carfree -- when I first started biking up Wolf Creek, it was only paved for the first 7 miles, and a lot of people still called Hwy 126, Route F, so I guess that dates me. Wolf Ck., etc. has been paved for many years now].