R.I. Gen. Laws § 17-18-11: Time of closing of polls.

Elective meetings in all cities and towns shall be continuously kept open for voting until 8 p.m.; provided, that any qualified voter who is waiting in line to vote at 8 p.m. shall be entitled to cast his or her vote. When all persons entitled to vote have been afforded a reasonable opportunity to do so, the polls shall be closed.