the east and meets the interchange with US 29, US 78, SR 8, and SR 316, where the exit numbers reset and the loop begins again. The entire length of SR 10 Loop is part of the National Highway System, a system of routes determined to be the most important for the nation's economy, mobility, and defense. History 1960s The highway that would eventually become SR 10 Loop was established as SR 350 between June 1960 and June 1963. It extended from US 129/SR 15 in the northwestern part of the city to US 29/SR 8 in the northeastern part. The entire divided highway was paved. By the end of 1965, US 29 was designated on SR 350 from the US 129/SR 15 interchange, which also had US 29 Temp. and US 441 Temp., to the US 29/SR 8 interchange. US 441 Temp. was designated on it from the US 129/SR 15 interchange to the US 441/SR 15 Alt. interchange. A western extension of SR 350, ending at US 29/US 78/SR 8/SR 10, was under construction. Also, SR 350 was under construction east-southeast just slightly from the US 29/SR 8 interchange. In 1966, SR 350 was decommissioned. US 29 was designated on the freeway from the western terminus to where it, as well as SR 8, depart the freeway. This interchange also had SR 8 Bus. and SR 106. SR 8 was designated on the entire length of the freeway. Its former path through the city was redesignated as SR 8 Bus., still concurrent with US 78/SR 10. In 1967, US 29 was extended on the freeway one interchange to the east. At this interchange, SR 72 was extended southeast to end here, concurrent with US 29/SR 8. 1970s and 1980s In 1976, SR 72 was indicated to be "projected mileage" from this point south to US 78/SR 10, then southwest and west to end at US 441/SR 15. In 1980, the freeway was completed along this path, with US 129/US 441/SR 15 designated on it. The next year, the portion of the freeway between US 29/SR 8/SR 72 and US 78/SR 10 on the northeastern part was downgraded to a divided highway. In 1983, the final piece of the freeway on the southwestern part was indicated to be designated as SR 732 as projected mileage. US 129/US 441/SR 15 Alt. was designated on the freeway from the southern end