41. An hour later, a snowplow driver died when his vehicle flipped over. 42. Snowplow crews had to go to work early Monday in parts of Minnesota.43. Fresh snowfall between training and qualifying meant that early starters acted as snowplows . 44. He invented in other areas too : for example, a rotary snowplow . 45. The snowplow crew can clear as little as of the road per day. 46. Wedge snowplows were the traditional automated method of clearing snow from railroad tracks. 47. For this purpose, the rotary snowplow was devised. 48. During heavier snow conditions, rotary snowplows are used. 49. The bars are set in the ground like driveway stakes used to guide snowplows . 50. And Mayor Anthony Masiello banned all nonemergency driving until snowplows could clear the streets.