What is a potential negative outcome of excessive snow accumulation on roads?

Excessive snow accumulation on roads can significantly hinder safe travel and overall roadway conditions, which directly ties to the increase in accidents and traffic disruptions. When snow builds up, it can obscure lane markings, create hazardous driving conditions, and reduce traction for vehicles. This leads to a higher likelihood of vehicles losing control, skidding, or being unable to stop in time, thereby increasing the risk of collisions. Additionally, heavy snow can block access to intersections and other critical points on the road, exacerbating traffic jams and leading to delays as drivers navigate through or around difficult conditions.

In contrast, the other options illustrate outcomes that are generally contrary to the effects of excessive snow. Enhanced roadway safety and improved drivability for all vehicles would not be plausible under heavy snow conditions, as this creates an environment that is more dangerous and less navigable. Increased efficiency of snow removal is also not typical when there is excessive accumulation, as it can complicate the snow removal process and require more resources and time.