Yes, regarding the mesh. I was wondering if a flexible mesh might be better. Toynbee tiles seem to become illegible mostly because individual pieces shift over time and make them look more of a jumble, this becomes more pronounced as the individual pieces become smaller. I was thinking more fiberglass, too, but even burlap would be fine probably.

A good flexible adhesive on the back of the pieces then pressed firmly into the fiberglass/cloth and weighted until set up.

One thing to consider is that the asphalt crack filler needs to be pressed into and around the pieces, serving a role similar to grout in tile. So the order of operations would be important. That’s more of an assembly issue, I guess.

There are numerous open source tile mosaic softwares out there that will generate the tiling, including the needed gaps for ‘grout’.

And Armstrong Flooring makes VCT in a huge array of colors. A source for vinyl tile of specific colors

Super fun, I am going to talk with my local folks and find a good location for a small test of these ideas. Such fun, thanks for engaging