A simulation was created for both westbound and eastbound SR120. Photo-simulation was the medium chosen as the easiest to understand and most realistic means to present the new design to the public.
POITRA created a partial 3D computer model of the interchange with proposed bridge structures, ramp roadways and fill slopes. The model was then aligned to the perspective of the Engineer provided base photographs.
The models were rendered and composited with the base photograph. The buildings, trees and utility poles affected by the project were removed. The background elements exposed by these removals were restored. This work was accomplished using traditional digital painting techniques.
POITRA relied upon the past bridge and highway design experience of its principals to interpret the Engineer's plans and to ensure the accuracy of the finished simulation.
The final images were used in internal California Department of Transportation (CalTrans) and City of Manteca design sessions and for public outreach programs.