Jackson Hole airport has a devil of a time keeping the sage grouse off the runway, and I see tons of sage grouse crossing the roads while I'm antelope hunting or just cruising the prairie. Roads don't bother sage grouse in the least.
Likely that lek predates the airport, but your point is still a good one. The roads may not be a problem, but the weeds that often follow new or existing roads are. Road beds are the perfect area to get cheatgrass established in an area. Once the area burns... goodbye sagebrush and hello cheat. Some of that Snake River Plain country is monoculture of cheatgrass where sagebrush used to grow. Not good for wildlife, ranching or even recreation.
