Interstate 15 and Las Vegas Boulevard run parallel to each other in which direction ?
Route 95 , Interstate 215 , Lake Mead Parkway ) Las Vegas Spaghetti Bowl , where Interstate 15 and U.S. Route 95 intersect ( also U.S. Route 93 and Interstate 515 being one or the other ) in downtown Las Vegas , along with access to / from Martin Luther King Jr Boluevard .