Final answer:
Rural highways, especially older ones, tend to have issues with poor road conditions and lack of signage rather than traffic congestion, which is more common in urban areas.
Step-by-step explanation:
Rural highways, especially older ones, often present a variety of issues. The options presented in the question are traffic congestion, poor road conditions, and lack of signage. While traffic congestion is commonly associated with urban areas and is a significant issue in cities, resulting in long delays and increased air pollution and fuel consumption, it is not typically the primary issue on rural highways. Instead, rural highways are more prone to problems like poor road conditions due to lack of maintenance and funding, as well as lack of signage, which can make navigation difficult. Therefore, out of the choices provided, options 2) Poor road conditions and 3) Lack of signage are more likely the problems presented by older rural highways rather than traffic congestion.