Unless there was very old pedestrian traffic/paths along there, I think it would be an exercise in futility.
I own a street sweeper company, and all I've done for the last 30 yrs, is work with street sweepers in relation to regular street sweeping, and also construction related work along freeways (clover-leafs, etc....). And one thing you have to remember about them, is that for all the years of the existence of roads, any time people fling their tab, can, cap, foil-wad, etc... out their windows, a lot of that is going to end up in the grass directly adjacent to the paved roads. So you can expect that the trash ratio along road-sides goes exponentially up.
There has to have been some sort of long-term pedestrian usage, and .... hopefully .... set back from the edges of the road far enough to be out of the "fling" zone of cars.