Answer:
Weather could make it so its safer to drive at lower speeds rather than higher ones. Hydroplaning can happen while driving at high speeds with water covering the roads. And usually just on a normal day, traveling at the speed limit is permissible, using common sense. When you're driving, you have to be aware of all environmental circumstances and base your driving off of that.
It was too much power to congress
The black death effect society by a series of religious, social, and economic upheavals. it was one of the most devastating pandemics in human history, peaking in europe between 1347 and 1350 with 30% to 65% of the population killed.
hope this helps, God bless!