Introduction  In order to obtain the optimal structural layout scheme for photovoltaic supports in the road domain of the transportation and energy integration project, an idea of comprehensive comparison is proposed by combining the upper structure of photovoltaic supports with corresponding foundations, and a comparative analysis is conducted based on this idea.

  Method  For a standard photovoltaic array, based on previous project experience, three feasible structural layout schemes for photovoltaic supports were designed, and a technical and economic comparison was conducted among these three schemes.

  Result  The comparison results indicate that the double-column and double-pile scheme has the lowest overall cost and the highest technical feasibility.

  Conclusion  Through comprehensive comparison, the optimal structural layout scheme for photovoltaic supports in the road domain of the transportation and energy integration project has been determined, which can provide ideas for the optimization of the structural layout scheme for photovoltaic supports in similar projects.