That is the same as just down the road.
Walk down the railroad track.
Walk down the beach
And as we wind on down the road
I’m a-thinkin’ and a-wonderin’, walkin’ down the road
Well, I’m running down the road trying to loosen my load
You get the point.
The next one is a little different. It means all along or something similar.
When I wanted you to share my life
I had no doubt in my mind
And it’s been you woman
Right down the line
You can also say, “walk down the line” which also means along, except it’s a line of people, cars, etc
CCR - this is a variation of down the road/street.
Down on the corner
Out in the street
Down and out - meaning depressed
I’m down with that - Modern slang meaning you are OK with doing it.
Get down - old hippie slang meaning to dance enthusiastically.