Transport and constraints: Due to many potholes on road X, reaching the airport in time is difficult — identify the implicit assumption about alternative routes

Given data

• Statement: Because of many potholes on road X, reaching the airport in time has become difficult.
• Assumption I: Reaching the airport in time may not always be necessary.
• Assumption II: There is no other convenient road to the airport.

Concept/Approach

To attribute the difficulty to road X, one must assume people cannot readily avoid that road with an equally convenient alternative. The necessity of punctual arrival is unrelated to the causal claim.

Step-by-Step reasoning
1) If an equally convenient alternative route existed, the potholes on X would not generally make timely arrival difficult ⇒ II is implicit.2) Whether punctuality is essential does not affect the truth of the difficulty claim ⇒ I is not implicit.

Verification/Alternative

Consider a scenario with a smooth, equally quick route Y. Then potholes on X would not broadly cause difficulty, contradicting the statement. Hence II is required.

Common pitfalls

• Confusing the normative need for punctuality with the causal barrier described.

Final Answer
Only assumption II is implicit.