In what instance would a traffic study be performed?

Answer: B — To study the effects of road repairs on traffic flow

A traffic study is conducted primarily to understand how various factors affect traffic flow, particularly the effects of changes in the road network. This can include temporary changes, such as road repairs, which can influence vehicle movement, congestion levels, and safety. By analyzing the data collected during such a study, traffic engineers can make informed decisions on how to implement repairs while minimizing disruptions to traffic. It helps in planning for optimal traffic management and improving overall road safety. In contrast, determining the costs of construction materials involves financial metrics rather than traffic behavior, hence it doesn’t pertain to the objectives of a traffic study. Assessing landscaping options for newly built roads focuses on aesthetics and environmental aspects rather than vehicular movement and flow. Establishing speed limits for rural areas is based more on safety regulations and traffic calming measures rather than direct observations of traffic patterns that a traffic study would provide.