The major problem facing the railway transportation compared to road transportation is

Step 1: Analyze the question The question asks for the major problem of rail transport when compared with road transport. So we are looking for a weakness that rail has and road does not.

Step 2: Explain the concept Rail transport runs only on fixed tracks between fixed stations. Road transport can reach almost any town, village, or even your doorstep. This difference is called flexibility.

• Rail: fixed routes, fixed terminals, so goods and passengers need extra transport to and from the station. This is not door-to-door service.
• Road: flexible routes, door-to-door delivery, and it can be extended anywhere a road can be built.

Step 3: Evaluate the options

• A. Low patronage: This is a result of rail's weaknesses (especially in Nigeria), not the basic problem compared with road. It is not the core structural difference.
• B. Excessive speed: Speed is not a problem. Trains are generally fast and safe, so this is wrong.
• C. Inadequate manpower: This is not a recognised distinguishing problem of rail versus road.
• D. Lack of flexibility: Correct. Trains are restricted to the rail lines and cannot deviate or offer door-to-door service the way road vehicles can.

Step 4: Answer The correct option is D. lack of flexibility.

Exam tip: When you see "compared to road transport" in a Geography question, think of flexibility and door-to-door service. Road wins on these, while rail wins on carrying heavy, bulky goods over long distances cheaply.