Abstract
This study investigates the stagger of tram overhead lines and its effect on pantograph carbon strip wear. Using a specialized measurement vehicle equipped with a stagger decoder, field data were collected along selected tram routes. The measured wire geometry was compared with the original design documentation to assess deviations and their impact on energy collection efficiency and strip longevity. Results highlight areas where design tolerances differ from reality, providing insights for infrastructure optimization and maintenance planning. The findings demonstrate the importance of precise monitoring of overhead line alignment to ensure uniform wear and improve the reliability of tram systems