Ok this is a bit of a weird one. Imagine the main road is about 9ft above the level of a garden. Would it be possible to lay a sloped drive that ran down into the garden? What sort of materials would you need? Gardens about 50ft long btw and no limit on the slope length, but thinking 30ft --> 20ft flat (approx 10-15degree slope). This is mostly a materials stress question btw as i'm trying to work out how to hold the slope together at the high end.
Nice relaxing sunday morning question for you LOL.