Nothing says summer like piling your kids, your dog, and 300 pounds of luggage into the family car and heading out on an inadvisably long road trip. And yet millions of us do it every year. Unfortunately, all too often the euphoria lasts about as long as it takes to get out of our driveways. If you’ll be road tripping this summer, consider downloading a few new iPhone and iPad apps to help the miles fly by. Here are five tried-and-tested apps guaranteed to keep everyone busy and happy.