Gardening at the roadside

Does it have a fence/wall/hedge between the lawn and the road?

There's a retaining wall at the bottom of the slope but it doesn't go above garden level (because the garden is higher than the street).

Cut flowers....admittedly you can't eat them but would save you buying any ?

I wouldn't want to grow anything to eat near a road but I suppose it how busy it is and how close they will be to the traffic.

My veg patch is not too far from an A road. It's at the front side of the house, and is where it is because that's the only place I could get one after other considerations. It isn't ideal but it's what I have available. Everything gets washed whether root or leaf borne harvest. My thoughts would be if you have an alternative probably use that, if not then wash it etc.