Based on the context and the answer, generate a question. 

Context: One very dark and stormy night a travelling salesman was driving along a country road . The rain was so heavy he could hardly see two feet in front of him . He decided that he should stop for the night but did n't know where . Just then he saw a faint light in the distance and headed toward it .

Answer:

They were not suitable for driving .



How would you describe the conditions the salesman encountered ?