Explanation

Transportation modes: road (most flexible, door-to-door), rail (efficient for bulk goods, fixed routes), water (cheapest per ton-mile, slow), air (fastest, most expensive, limited cargo). Each suits different needs.

Nigeria relies heavily on roads – rail network deteriorated after independence. Lagos and Port Harcourt have major seaports. International airports in Lagos, Abuja, Kano, Port Harcourt. Road conditions vary greatly.

Transportation infrastructure affects development: connects producers to markets, enables migration and urbanization, facilitates trade. Poor roads increase costs and limit economic opportunities in rural areas.