Transportation systems consider cost, capability, reliability, accessibility, security, and traffic. Common modes include railroad (best for large quantities over long distances but high cost), water carriers (best for large loads but slow and only access seaports), air carriers (very fast but high cost and best for perishables), motor carriers (low cost but traffic and security issues), and pipelines (low cost for liquids/gases but issues with security). Companies choose modes based on their product needs and the features of each system.