Final answer:
The two primary causes of work zone crashes are speeding and distracted driving, both of which can lead to increased risk in areas where attentiveness and compliance with traffic changes are crucial.
Step-by-step explanation:
The two main reasons for work zone crashes are typically speeding and distracted driving. Work zones require drivers to be more attentive and responsive to changing conditions, such as shifted lanes, reduced speed limits, and the presence of road workers and construction equipment. When drivers fail to reduce their speed accordingly or are not fully attentive to the road, the risk of crashes increases significantly. To prevent such incidents, it's crucial for drivers to adhere to the posted speed limits and stay focused on the driving task at all times, especially in work zones.