Final answer:
Narrow shoulders, bridges, ditches, guard rails, and trees are examples of road hazards which can pose a potential danger to drivers.
Step-by-step explanation:
Narrow shoulders, bridges, ditches, guard rails, and trees are examples of road hazards. They can pose a potential danger to drivers and may cause accidents if not properly addressed. Road hazards are a common concern in transportation infrastructure and are an important topic in the field of Social Studies as it relates to the design, planning, and maintenance of road systems.