Two more sections of I-495—from Islandia to exit 61 in Holbrook and from William Floyd Parkway to exit 71 near Riverhead—were completed in the mid-1960s. The section of I-495 between William Floyd Parkway and Riverhead was opened as a discontinuous highway segment in June 1969, and the freeway gap between Holbrook and William Floyd Parkway was filled in December 1969. The last of I-495 from exit 71 to CR 58 were opened to traffic on June 28, 1972. By the time I-495 had been completed, it was being used by over 150,000 vehicles a day. From the outset, a minimum speed limit of was enforced on the segment of I-495 in Nassau and Suffolk counties.