Yes, the rumble strips extended nearly all the way across the shoulder on one section of I-84 through eastern Oregon. There was a strip of pavement about 10" wide between the motor vehicle lane and the edge of the rumble strips, but there was no way I was going to ride there unless I was certain that no traffic was approaching from behind. There just was not enough room to make riding there safe. Most of the time I rode close to the far outer edge of the shoulder on this section (away from motorized traffic) and sometimes the rumble strips there were filled with sand, which made them much smoother. Eastern OR was the only place I encountered this type of rumble strip. Most of the I-84 (Oregon) and I-90 (Montana) corridor that I rode had rumble strips that were near the edge of the auto / truck traffic lane, and that left about 6' of shoulder open for cycling without too much trouble.