The paper offers an in-depth analysis of a steel truss portal designed to support road traffic signaling, information, and monitoring equipment on highways. This analysis encompasses both static and modal assessments of the structural performance under a range of operating conditions. The Finite Element Method was employed for this evaluation, using Autodesk Inventor Nastran for linear static, normal modes, modal frequency response, and random response analyses, in addition to ANSYS modules for static structural, modal, and random vibrations investigations. The results provide valuable insights into the dynamic behavior of the resistance structure and shed light on the implications of using different Finite Element Analysis (FEA) software packages for calculating critical values essential for the safe and cost-effective design of similar structures through numerical modeling.