On the right side of the road, in the distance, is what appears to be a water dispersing wagon, perhaps spraying the road to keep down the dust? If so, I wonder how long that would last before the water evaporated away.

Oil works so much better, as the American military realized when treating dirt roads in the South Pacific, prompting some Japanese officer to comment that he knew the war was lost when he saw the Americans using that precious commodity for such a mundane task.

Or, is it something entirely different?

[Note the spray. -tterrace]

Bingo! What do you use to create that further enlargement?

[The full-size 168 Mb scan from the LOC, also enlarging that to 150%. -tterrace]

For the most part, on the corner of Taylor street:

View Larger Map