Photo-simulations proved to be the best medium for accurate evaluation and for confident presentation to public. Many factors would potentially affect this location. DMU and EMU vehicles have different height profiles; EMU have the additional hardware of a catenary system adding to the visual, DMU are louder and the noise source higher on the vehicle, which translates to taller sound barriers if barriers are required.
Poitra Visual's illustrations of bridges, catenary systems, additional railroad track and sound walls reassured the public that this new transit service could be an attractive addition to their communities.”
K.P., P.E. URS Corp
North Metro Project Manager
The simulation would reflect all of these variations including images with and without walls and with and without the POITRA model transit vehicles to show how the momentary presence of the vehicles affects the view impact.
POITRA artists prepared the base photograph to recieve the elements of the proposed corridor using traditional digital painting techniques. This included separating foreground elements such as the houses and fences from the background material.
Accurate 3D site models were built to include the rail corridor with the elements associated with each of the alternative commuter rail vehicle types. The models included the sound walls appropriate to each alternative and the appropriate POITRA model RTD commuter rail vehicle. The past sound wall design experience of POITRA principals helped to create plausable wall structures since the Engineer's conceptual design did not included that level of detail.
The model was camera matched, lighted, rendered and composited with the selected POITRA survey photograph in numerous different combinations to cover all the possible conditions. A simulation was created for each of the situations to be studied.
The finished simulations were used in meetings with Fastracks public stakeholders, on the project website, in newsletters and in the EIS document.