What's the difference between those terms? Can they be used just about interchangeably?
road: a long, narrow stretch with a leveled or paved surface, made for traveling by motor vehicle, carriage, etc.; street or highway. Random House Kennerman Webster's College Dictionary
pavement: n. (Chiefly AmEng) A hard smooth surface, especially of a public area or thoroughfare, that will bear travel. American Heritage® Dictionary
roadway: n. A road, especially the part over which vehicles travel. American Heritage® Dictionary
Il y a des nids de poule sur la chaussée, fais attention ! There are potholes on the road [surface], be careful! WordReference