Las Vegas Celebrates Completion of I-15 Improvement Project

The yearslong work on Interstate 15 and Tropicana Avenue added capacity and improved accessibility near the Las Vegas Strip

Sept. 24, 2025

2 min read

Construction on the Interstate 15/Tropicana Avenue project in Las Vegas, Nevada, in November 2024.

Nevada officials celebrated the completion of a yearslong highway project near the Las Vegas Strip this week.

The $305 million Interstate 15/Tropicana Avenue project reshaped one of Las Vegas’ busiest traffic corridors. Work began in 2022 to add capacity and improve accessibility near the Strip.

Gov. Joe Lombardo discussed some of the challenges faced during construction at a Sep. 23 ribbon-cutting ceremony.

“When the Super Bowl was taking place or F1 was taking place, there was a request to shut down construction during that process, but with the cooperation from MGM and those conversations, we were able to continue the project moving forward,” Lombardo said. “Could you imagine the cost to the state if the project was shut down for any period of time?”

The I-15/Tropicana Avenue interchange serves as many as 300,000 drivers on major holiday weekends. The reconstruction project widened streets and ramps, added more lanes, built new bridges and improved pedestrian options.

Tropicana Avenue now has four lanes in each direction between Las Vegas Boulevard and Polaris Avenue. A new HOV half-interchange was added to the south side of Harmon Avenue to improve access to the resort corridor.

Dean Martin Drive was realigned for the arterial to run under Tropicana Avenue and improve traffic flow. The project included new and reconstructed bridges, including a Tropicana Avenue bridge over I-15 and a modified flyover bridge connecting the two roads.

Crews also improved surrounding intersections’ traffic signals with reflective black plates and vehicle detector loops. Tropicana Avenue’s sidewalks were widened to ten feet in both directions.

“Not only are we increasing the flow and reducing congestion (on the interchange), we're also improving the safety through here," Nevada Department of Transportation Project Engineer Bryan Snider told KTNV. "We're making it safer to travel, we're making it easier to travel and we're making it safer for pedestrians."

Sources: KVVU, Nevada Department of Transportation, KTNV