The Interstate 15, Tropicana Avenue interchange, seen here on Jan. 31, 2019, is set for a $230 …

The Interstate 15, Tropicana Avenue interchange, seen here on Jan. 31, 2019, is set for a $230 ...

The Interstate 15, Tropicana Avenue interchange, seen here on Jan. 31, 2019, is set for a $230 million upgrade. Construction on the project is slated to begin in 2021 and finish in 2024. (Mick Akers/Las Vegas Review-Journal)