A higher aggregate mix sounds more like Tarmacadam (i.e. tarmac) although probably with a bituminous (rather than tar) binder these days. The higher aggregate

A higher aggregate mix sounds more like Tarmacadam (i.e. tarmac) although probably with a bituminous (rather than tar) binder these days. The higher aggregate mix generally doesn't make for a more durable road though, but there's far more to a good road than just the materials its made from.