Statement:\nVehicular traffic has increased so much that, during peak hours, it takes at least two hours to travel between the city and the airport.\n\nCourses of Action:\nI. Prohibit all non-airport-bound vehicles from using the city–airport road.\nII. Regulate flight departure/arrival waves to reduce peak-hour road congestion.\n\nWhich course(s) of action logically follow(s)?

Introduction / Context:
Peak-hour road congestion to the airport can be alleviated by smoothing demand (flight wave regulation) or increasing supply (lane management, transit). A blanket road ban for non-airport vehicles is disproportionate and impractical unless there is an exclusive access road and legal basis.

Given Data / Assumptions:

• Travel time balloons to ~2 hours only during peak hours.
• Airport traffic is a major contributor to the peak surge.
• No dedicated access-controlled expressway is mentioned.

Concept / Approach:
Choose a targeted, feasible, legally sound step. Regulating flight banks can shift passenger/taxi arrivals, smoothing the demand curve for the connecting road. Prohibiting non-airport traffic is over-broad and likely unenforceable without alternate routes.

Step-by-Step Solution:

Verification / Alternative check:
Many airports manage “peaks” through slot coordination to ease both terminal and kerbside congestion.

Why Other Options Are Wrong:

Common Pitfalls:
Over-reliance on bans; ignoring demand management tools.

Final Answer:
Only II follows.