Bottlenecks can be divided into three categories: Infrastructure, Capacity, and
Geography. Those related to the first describe how many sections of transport
infrastructure along the corridor are in bad condition. Capacity bottlenecks
concern traffic jams, customs, and insufficient port or rail capacity. The final
bottlenecks, those that pertain to geography, involve barriers along the corridor
(ice conditions, mountains etc.).
Obviously most stakeholders would consider this set of KPIs important, but
more so infrastructure operators and users, and most notably those who are asked
to pay for infrastructure construction and maintenance.