Dense smog shrouded Delhi-NCR on Sunday morning as AQI spiked to ‘severe plus’ category. As the toxic haze reduced visibility considerably, multiple vehicles involving buses, a truck, car and motorcycle crashed in succession. In two major pile-ups, multiple vehicles were involved in a road accident on fog-hit highways in Haryana on 14 December, NDTV reported. With remarkably reduced visibility on roadways, drivers of motor vehicles struggled to navigate and ended up in a chain collision at D...