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ESTD Year: 2017 | Impact Factor: 6.9
DOI Prefix: 10.47001/IRJIET
ESTD Year: 2017 | Impact Factor: 6.9
DOI Prefix: 10.47001/IRJIET
Vol 10 No 9 (2026): Volume 10, Issue 9, September 2026 | Pages: 169-178
International Research Journal of Innovations in Engineering and Technology
OPEN ACCESS | Research Article | Published Date: 29-09-2026
At the concept-planning stage, planners need to identify which viewing directions should be examined for elongated structures and whether the dominant viewing direction changes with distance. This study proposes a dual-control workflow with a transition point q*, defined as the height-normalized distance at which the end face and long side occupy comparable portions of the image frame. Cát Linh Station is modeled from OpenStreetMap; scenarios varying massing ratio, height, and lower-level openness are used to examine result stability. The results show that distance alone is insufficient for selecting a viewing direction: near zones require attention to the end face and lower-level openness, zones around the transition point requires both directions to be retained, while farther zones require control of the continuous extension of the long side. The two modeling approaches produce similar transition points, while increasing lower-level openness shifts the transition point outward. The workflow enables planners to screen visual corridors and rapidly test massing alternatives before detailed modeling. A pilot check using one calibrated field image produced a value within the model sensitivity range. q* is a comparative indicator under a common camera rule, not a perceptual threshold or a basis for permitting decisions.
viewing orientation transition point; visual impact screening; urban massing; frame occupancy ratio; virtual viewpoint; elevated railway station
Hoang Van Tai, & Le Thi Thanh Hang. (2026). Screening Urban Visual Corridors for Elevated Railways: An Approach Based on a Viewing Orientation Transition Point. International Research Journal of Innovations in Engineering and Technology - IRJIET, 10(9), 169-178. Article DOI https://doi.org/10.47001/IRJIET/2026.109018
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