This is an expansion set to my monster truck ramps found here:

https://makerworld.com/en/models/38502

My original set of curved monster truck ramps worked quite well but due to the curve I wasn't able to make them stackable.

And the straight ramps, which were stackable, had ‘barriers’ along side the ramps that are fun in their own way, but somewhat limit the connection options.

The goal of this set was to build a set of simple ramps similar to the original curved ramps, but which had no ‘barriers’ on them, and were 3d stackable.

Due to the shallow slope on these it's a bit tricky to get a smooth surface finish. Either 15% rectilinear infill, or 15% gyroid infill rotated by 45 deg works well to keep the slope supported well.

Some of the ramps in my pictures were test pieces using different settings (gyroid at default rotation) so are a bit fuzzy, as there's times when the face of the ramp is unsupported for a few layers - don't make that mistake! :-)