Southern Nevada's busiest thoroughfare, Interstate 15, sees more than 200,000 vehicles a day and is plagued by gridlock and accidents.
Design-build contractor Las Vegas Paving Corp. began work in late 2009 on a solution: a $246.5-million widening of I-15 South between Silverado Ranch Boulevard and Tropicana Avenue. Jacobs Engineering Group Inc., Pasadena, Calif., performed design.