Because the survey is compulsory, officials are expecting 100 percent compliance.

"We, like the rest of the industry, struggle to get 100 percent compliance with our patch management," he said.

The Park Service reports 96 percent compliance by the military.

Any company seeking certification must achieve at least 90 percent compliance in a formal quality audit.

The agency reports 97 percent compliance among the nearly 18 million men who have been eligible since 1980.

But, he added: "It's impossible to be in 100 percent compliance.

But that will not be enough if 100 percent compliance means drivers will still fall asleep.

There were 799 sites in 100 percent compliance at time of inspection.

Some Council members have begun to talk about how 100 percent compliance may not be possible in some cases.

"It has been implemented with almost 100 percent compliance," he said.