Las Vegas Review Journal » Rather than express lanes, motorists will be able to access carpool lanes along Interstate 15. And, giant, dynamic digital screens will tell us how fast to drive and warn of potential traffic snarls. The improvements are part of the $1 billion Project Neon, which calls for widening the Spaghetti Bowl freeway interchange of I-15 and U.S. Highway 95 by 2019. Just a year into construction, Project Neon is about 40 percent complete.