Interstate 515

Interstate 515 (I-515) is a 14.44-mile-long (23.24 km) spur route of I-15 in the US state of Nevada that runs from the junction of I-11, I-215, and State Route 564 (SR 564) at the Spaghetti Bowl Interchange in Henderson to the junction of I-15, U.S. Route 93 (US 93), and US 95 at the Las Vegas Spaghetti Bowl Interchange in Downtown Las Vegas. The freeway connects traffic headed from Boulder City and Henderson to Downtown Las Vegas via a direct, high-speed route, and it runs concurrently with, US 93, and US 95 along its entire length.

The I-515 designation was first approved in 1976, but construction did not begin until 1982, and was constructed in stages until it reached its former terminus north of Railroad Pass in 1994, when signs of the designation finally were put up. I-515 was built to bypass Fremont Street and Boulder Highway, both of which were former alignments of US 93, US 95, and US 466, and provide a direct freeway connection with Henderson.

Prior to August 2017, I-515 extended southeastward past the I-215 interchange before terminating at the southern city limits of Henderson. This segment has been redesignated as I-11. The Nevada Department of Transportation announced in 2022 that part of the preferred alternative for the future northward extension of I-11 would follow the remainder of the I-515 alignment. Signs for I-11 along I-515 and US 95 north of I-15 will begin to go up in 2024, and the I-515 designation is expected to be decommissioned.