A support system for supporting one or more transmission lines and for mitigating sagging or swinging of the transmission lines may comprise support lines coupled to the transmission lines by adjustable risers. The adjustable risers may be dynamically adjustable in length to compensate for the sagging or swinging of the transmission lines. Various embodiments of the adjustable risers, support lines, and support system are contemplated. These embodiments may include adjustment mechanisms, sensors, shock absorbers, positioning mechanisms, zero gap connections, guy wires, lateral members, and various different arrangements of the elements.