The proposed width between two parallel sides of the carrier elements is 2,64 m. This is too much for horizontal transport on a truck, but these hexagons can be accommodated vertically in a high-cube container or swap body. Exceeding the standard road vehicle width of 2,5 m is advantageous for application on carports, parking lots etc. with a common spacing of 2,5 m of passenger cars.
Depending on the orientation of the hexagons (longitudinal or lateral to the road resp. rail) and the number of parallel hexagons, transport infrastructure of various width can be covered (small circles in light blue indicate the position of pillars):
Because of the variety of the span between pillars it seems reasonable to develop at least two variants of the hexagonal carrier elements, a lighter and a more massive, stiffer one.
The proposed dimensions match not only to line-shaped transport infrastructure, but also the wider 16m-grid of big parking lots or a bus station with 7 m wide driveways and 3,5 m wide platforms:

The variant with wider span is also applicable for roundabouts:
Synergies with catenary, fences or noise barriers
The necessity of erecting a lot of pillars along a road or railway line can create synergies with the electrification of transport infrastructure with overhead power lines or the construction of noise barriers. The pillars can also be used for continuous fencing along the line, possibly a decisive factor for facilitating driverless mobility solutions like robotaxis or autonomous buses in rural environments.
Snow-permeable rain protection
Because of the inclined panels a photovoltaic system itself doesn't represent an effective rain cover: Water will drop down from the panels and in particular in case of wind from the north, many rain drops will pass between the panels. Closing the gaps between the panels completely or mounting a horizontal rain cover below the panels would cause problems in case of snowfall: Snow could not slide down from the panels, leading to reduced electricity yield and heavier load for the supporting structure.
Rain protection for pedestrians below the photovoltaic elements could by achieved through rain cover elements inclined oppositely to the inclination of the solar panels and small gutters. Thus, rain drops would always hit either a panel or a rain cover element: