I can think of many reasons to ban it especially excessive rush of traffic, major fatal accidents (due to drowsiness or speed) are the major ones. Yes there is price for everything but depends on what we are trading it for. I was so prepared to go for umrah with my family and spent so much on my car and now the sad news. However, I remember many families who lost their loved ones in fatal accident one of them was my classmates 18yrs ago. I hope KSA had discussed with wise advisers prior to implementing the ban. Most importantly, lets hope it works out for our best interest. Whatever happens - happens for the best; and Allah knows the best.