Construction on NDOT’s I-15 Tropicana Interchange Project started in August. This project will widen Tropicana, construct new bridges, realign Dean Martin Rd under I-15, add capacity, and improve traffic operations. Everything you need to know is here on this website. Our free app is another way to stay in touch and up-to-date on project information and activities. Download i15trop for iPhone and Android. Can’t find what you’re looking for? Contact our team: [email protected].