The correct answer is A; Vehicles.
Explanation:
There are three things that the Highway Transportation System is comprised of; people, roads, and vehicles. Each of these can be a risk on the roadways. Depending on the weather, traffic, and driver.
After researching, I found that different vehicles cause the most predictable risk than other aspects. There are numerous makes and models of cars, trucks, and SUVs on the road. In addition to the the regular traffic, we also have the Semi trucks on the roads. The older cars on the roadways can be a risk because they aren't equipped with more modern technology and features that newer cars have. The semi truck drivers have blind spots more so than a regular vehicle which can cause accidents.
Learn more about the Highway Transportation System at https://brainly.com/question/2978008
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