One of the key areas of state security is military security. Its provision requires a number of various activities of a political and military nature, among which an important role is played by host nation support (HNS) for improving ability to move allied forces and resources within the territory of the country. Fulfilling the tasks resulting from the HNS obligations is important because of the country’s defense aspects and the perception of the country on the international arena. One of the most important issues in this respect is making the regions and infrastructure available for the purpose of relocation and accommodation of troops, which is implemented based on a number of infrastructure investments. From the perspective of contemporary conditions, the expansion of transport networks of all modes of transport is necessary to ensure the required conditions for the movement of people and the transport of weapons and military equipment, support the allied forces in the event of a crisis or war. A modern transport infrastructure enables the development of the Polish economy and strengthens its link with the world economy. It is also an important component of national security, the state defence system and territorially balanced development of the country. Modern transport infrastructure, modernized rolling stock and integral transport management systems reduce costs in the economy, while contributing to lowering the pressure on the environment. Systematic improvement of transport infrastructure is one of the basic challenges for the development of the state, not only from the economic perspective, but also plays a priority role in relation to the state's security and defence.