I-15 / Tropicana Interchange
Feasibility Study


The I-15 / Tropicana Interchange Feasibility Study is a joint effort project sponsored by the Nevada Department of Transportation (NDOT) and the Regional Transportation Commission of Southern Nevada (RTC). The Federal Highway Administration (FHWA) is a key partner in the process providing guidance and review of the study’s work products. See the Fact Sheet here.

Study Area

The study looked at operations and potential improvements along I-15 from Harmon to Hacienda and on Tropicana Ave from Valley View to Las Vegas Boulevard.

Study Objective

The study had several objectives:

  • Improve the safety of the interchange and on I-15 in the vicinity of the interchange.
  • Improve operations on I-15 and on Tropicana while enhancing the performance of the interchange ramps and intersections. This means travelers will be able to get to their destinations faster.
  • Determine impacts to local businesses and resort destinations and provide early and upfront information to those affected.
  • Identify possible improvements that meet the goals and objectives above and prepare them to be carried forward to the environmental process.

Linking the study process to support the National Environmental Policy Act (NEPA) process

The study will serve as the foundation for future project specific environmental analyses’ embracing the philosophy of "Linking planning and NEPA".

Stakeholder Outreach

Stakeholder outreach is an integral component of linking planning and NEPA. The study process involved interested state, local, and federal agencies and included Public Review with an opportunity for comment. The study includes documentation of stakeholder outreach performed to date. Stakeholder outreach will continue throughout future federally mandated environmental review process.

Click www.epa.gov/Compliance/nepa to obtain additional information on the NEPA process.

The project is currently between the Planning and NEPA processes: