Transcript for Eclipse fever creating travel issues across US
On that eclipse, a pilgrimage under way for millions. Eclipse fever hits the U.S. But getting to that special spot is proving to be a challenge. ABC's Marci Gonzalez is in Lincoln city, Oregon, where the path of totality is expected to begin. Reporter: Tonight, bumper-to-bumper traffic in areas from coast to coast. This is all heading in -- Reporter: As record crowds rush in, vying for the best view of the total solar eclipse. We have our glasses and I think we're all excited to see this. Reporter: Some at a standstill so long left running low on fuel. And this is just the beginning. 200 million people live within a day's drive of the "Path of totality." So many expected to hit the roads. Officials in 14 states are preparing for what they say could be the worst traffic jam in U.S. History. Some states trying to ease congestion by stopping all road construction Monday and calling in the National Guard to help with traffic control. We're ready to do that. Reporter: Already long lines for gas. It's busy here. Reporter: Hotels booked up for miles. Makeshift campgrounds, filling up fast. We've been turning folks away for three days. Reporter: And those essential solar eclipse glasses selling out. You can't find them anywhere. Reporter: Ahead of what's expected to be the most watched total eclipse ever. And Tom, just 8500 people live here in Lincoln city, Oregon. But they're expecting 100,000 people to be here by Monday. Tom. The excitement is building.
This transcript has been automatically generated and may not be 100% accurate.