The Gulf Coast Highway is US 90. It runs from Texas to Jacksonville, Florida. I had a wonderful drive on 90 from New Orleans to Pensacola, within sight of the Gulf of Mexico for much of the way.

Gulf Coast Highway (James Hooker/Nanci Griffith/Danny Flowers)

Gulf Coast Highway
(James Hooker/Nanci Griffith/Danny Flowers)

Gulf Coast Highway
He worked the rails
He worked the rice fields
With their cool dark wells
He worked the oil rigs in the Gulf of Mexico
The only thing we've ever owned
Is this old house here by the road

And when he dies he says he'll catch some blackbird's wing
He will fly away to Heaven come some sweet blue bonnet spring

She walked through springtime When I was home
The days were sweet, The nights were warm
The seasons change, the jobs would come... the flowers fade
This old house felt so alone When the work took me away

And when she dies she says, she'll catch some blackbird's wing
Then she will fly away to Heaven come some sweet blue bonnet spring

Highway 90, The jobs are gone
We tend our garden, We set the sun
This is the only place on earth blue bonnets grow
Once a year they come and go
At this old house here by the road
And when we die we say, we'll catch some blackbird's wing
Then we will fly away to Heaven come some sweet blue bonnet spring

And when we die we say, we'll catch some blackbird's wing
We will fly away together come some sweet blue bonnet spring

https://geocities.restorativland.org/Nashville/1752/album6.htm#gulfcoast (corrected)

https://www.youtube.com/watch?v=DUqLleoZxtM