 Route 4 begins at a fork in the alignment of U.S. Route 1 in the community of North Kingstown ; the two left lanes of US 1 default onto Route 4 north , with the right @-@ hand lane carrying Tower Hill Road and US 1 north into the village of Wickford . Route 4 heads in a northwestern direction as a four @-@ lane divided highway , crossing West Allenton Road at an at @-@ grade intersection with a traffic signal after approximately 0 @.@ 5 miles ( 0 @.@ 80 km ) . The highway continues on a northwesterly projection , passing to the northeast of <unk> Hole Pond and to the southwest of Secret Lake in a heavily forested region . After Secret Lake , the highway curves to the north , crossing Oak Hill Road at another at @-@ grade intersection . 
