 The entire highway is allocated National Route 1 , part of Australia 's Highway 1 , and parts of the highway are included in the tourist routes Batavia Coast Tourist Way ( Tourist Drive 354 ) and Cossack Tourist Way ( Tourist Drive 351 ) . The vast majority of the highway is a two @-@ lane single carriageway with a speed limit of 110 kilometres per hour ( 70 mph ) , except in and around built up areas where it drops down to 50 , 60 , or 70 kilometres per hour ( 30 , 35 , or 45 mph ) . 
