The world's longest straight road is one which runs for around 150 miles without a single bend. The stretch of tarmac cuts through the Saudi Arabian Rub Al-Khali desert. The Middle Eastern nation has become a major player in motorsport recently, playing host to the prestigious Dakar Rally , a Formula 1 Grand Prix, and the Extreme E off-road championship. The country's vast expanses of desert have provided the perfect canvas for creating spectacular racing circuits and roads. But it's not just