I have a great idea though...
"Diagonal Stripes Painter....:
When painted to a block, it will display diagonally instead of horizontal or vertical.
My suggestion is still "minecrafty" because the diagonal paint will act like a normal block.
Just like stripes paint, only with the word diagonal attached to it.

"
Still wondering when would you release 1.7.10 of your roadworks mod. Honestly, I've been waiting for years, hehe.