Thank you for the great ideas!
I'll explain the space a little better. This is an old house plot, 1/4 acre in size, off a busy main road, across the street from a college and next door to a school building (meaning that recess takes place behind the garden and there's some more noise there as well, but not always). There is about 30 feet from the road to a small picket fence, in which space a more community-oriented space is planned for those who want to harvest. Ideally we would put any noise barrier around where the fence is, making the raised beds a great idea! Then there is about 30 feet to the right of the fence where there is a driveway and then another garden bed, which is completely open with some small plants and flowers.
In the back of the garden we do plan on creating a classroom space, where the noise curtain might be a good idea.
I've attached a diagram/map to show what this looks like roughly, and I can add pictures later!
Thank you again!