The task of routing overhead lines and cables originally focused on finding cost-effective connections between geographic points for transporting electrical energy. During the early phases of grid construction around the world, these lines—regardless of type—were generally met with public enthusiasm or at least acceptance. However, as more landscapes became increasingly influenced by technical infrastructure, all of which have become essential to modern industrial society, public perception began to shift. This growing awareness led to increased opposition, particularly toward overhead lines. This shift in public perception made it increasingly difficult to reconcile the requirements of routing and planning high and extra-high voltage lines. As the importance, size, number, and characteristics of the overhead lines increased, acceptance decreased, particularly in populated areas or those with special landscape characteristics. Therefore, in the planning of lines, routing principles emerged that consider the peculiarities of settlement, nature, and landscape areas, as far as technically possible. In modern line planning, in addition to technology, the perception of people and considerations for fauna and flora are increasingly included in the planning culture. The way how affected communities perceive the lines in the landscape has become a key factor in the planning process. In this chapter, in addition to presenting tower designs and cable laying types, the relevant routing principles are explained and illustrated with examples for both overhead lines and underground cables. The chapter also provides typical dimensions for overhead lines and cable routes, along with explanations of the associated conditions and constraints.