Bunuel
Urban Planner's Claim: The city plans to reduce traffic congestion by implementing a carpooling initiative that encourages drivers to share rides by offering tax incentives. The plan is based on the assumption that by reducing the number of single-occupancy vehicles on the roads, overall traffic volume will decrease.
Which of the following, if true, raises the most serious doubt regarding the effectiveness of the city's plan to decrease traffic congestion?
(A) Many drivers prefer to travel alone due to the flexibility and privacy it offers, even when financial incentives are offered for carpooling.
(B) The tax incentives provided for carpooling are structured to disproportionately benefit higher-income drivers, potentially leading to less participation among lower-income commuters.
(C) Public transportation systems are likely to see an increase in use due to higher awareness of environmental issues, regardless of the carpooling initiative.
(D) Most traffic congestion is due to commercial vehicles, which are not affected by carpooling incentives as they cannot realistically share vehicle space.
(E) The tax incentives for carpooling will initially cost the city a significant amount in lost tax revenue, which could have been used for other traffic reduction measures.
The goal of the city's carpooling initiative is to reduce traffic congestion by decreasing the number of single-occupancy vehicles on the road. To determine which option raises the most serious doubt about the effectiveness of this plan, we need to consider which factor would most directly undermine the basic assumption that reducing single-occupancy vehicles will alleviate traffic congestion.
Let's analyze each option:
(A) **Many drivers prefer to travel alone due to the flexibility and privacy it offers, even when financial incentives are offered for carpooling.**
- This option suggests that the carpooling initiative might not be very effective because many drivers may still prefer to drive alone despite the incentives. This directly affects the number of single-occupancy vehicles on the road and raises significant doubt about the plan’s effectiveness.
(B) **The tax incentives provided for carpooling are structured to disproportionately benefit higher-income drivers, potentially leading to less participation among lower-income commuters.**
- While this option points to a potential inequity in the plan, it does not directly challenge the assumption that reducing single-occupancy vehicles will decrease traffic congestion. It highlights a possible flaw in the incentive structure but does not suggest that the overall traffic volume would remain unchanged.
(C) **Public transportation systems are likely to see an increase in use due to higher awareness of environmental issues, regardless of the carpooling initiative.**
- This option indicates a potential positive shift towards public transportation but does not conflict with the plan to reduce single-occupancy vehicles. In fact, it could complement the carpooling initiative and contribute to reduced traffic congestion.
(D) **Most traffic congestion is due to commercial vehicles, which are not affected by carpooling incentives as they cannot realistically share vehicle space.**
- This option presents a significant doubt about the plan’s effectiveness. If most traffic congestion is caused by commercial vehicles, reducing single-occupancy private vehicles would not significantly impact the overall congestion. This directly challenges the core assumption of the plan.
(E) **The tax incentives for carpooling will initially cost the city a significant amount in lost tax revenue, which could have been used for other traffic reduction measures.**
- While this option highlights a financial concern, it does not directly question the assumption that carpooling will reduce traffic congestion. It suggests an opportunity cost but does not provide evidence that the carpooling initiative itself would be ineffective in reducing traffic.
Considering the options, the most serious doubt regarding the effectiveness of the city's plan is raised by option (D):
This is because it directly challenges the assumption that reducing the number of single-occupancy vehicles will significantly impact overall traffic congestion by indicating that commercial vehicles are the primary source of congestion, which the carpooling initiative does not address.