Gravel block + Tar block = ...

Asphalt block?

 

what is that? and what will it do?

 

Yes! There's a mod where you can get a car.. and I was already considering making a street and crap like that.
That'd be so awesome.
Devs pls.

 

what mod?

 

Creative mode.
This would be fun, I guess.

 

A race mod, called Felins I believe. It's a tech, found in settlements.