The I-15 App includes up-to-the-minute information from the Idaho Transportation Department to help you plan your travel during construction on I-15. Current travel times through I-15 construction zones and alternate routes (U. S. 91). Advice about the best times to travel. ("How long will it take to travel from Pocatello to Idaho Falls if I leave at 1 p. m. Thursday? "). Notices of delays or closures in your area. Interactive maps of I-15 work zones. Construction project details.