Presentation
Evaluating Visual Representations of Trajectory Speed to Support Operator Conformance in Surface Trajectory-Based Operations
SessionAS3: Interface Design
DescriptionThis work aims to identify which visual representation of trajectory speed most effectively supports pilot conformance during surface trajectory-based operations (STBO).
STBO is intended to optimize airport ground operations, and simulation studies have shown promising reductions in taxi time and fuel consumption.
Pilots must follow predefined speed profiles, a task that is particularly demanding during taxiing due to high workload and visual demands.
However, the visual representations that best support quick yet comprehensive understanding of these variations remain undetermined.
Drawing on Bertin’s graphical semiology, we designed nominal, ordinal, and numerical representations of trajectory speed.
We evaluated these representations in two studies in which participants drove a vehicle along a speed-constrained trajectory.
We measured trajectory conformance, cognitive load, and attention allocation.
The first study confirmed that providing trajectory-speed information improves conformance and showed that the nominal symbology performed best.
The second study indicated that numerical representations offer advantages for conveying precise speed targets, while nominal symbology better supports understanding both the type and magnitude of upcoming speed changes.
A hybrid symbology that pairs nominal cues for acceleration and deceleration with numerical indicators of the resulting speed is recommended.
The proposed symbology may enhance pilot performance in STBO.
STBO is intended to optimize airport ground operations, and simulation studies have shown promising reductions in taxi time and fuel consumption.
Pilots must follow predefined speed profiles, a task that is particularly demanding during taxiing due to high workload and visual demands.
However, the visual representations that best support quick yet comprehensive understanding of these variations remain undetermined.
Drawing on Bertin’s graphical semiology, we designed nominal, ordinal, and numerical representations of trajectory speed.
We evaluated these representations in two studies in which participants drove a vehicle along a speed-constrained trajectory.
We measured trajectory conformance, cognitive load, and attention allocation.
The first study confirmed that providing trajectory-speed information improves conformance and showed that the nominal symbology performed best.
The second study indicated that numerical representations offer advantages for conveying precise speed targets, while nominal symbology better supports understanding both the type and magnitude of upcoming speed changes.
A hybrid symbology that pairs nominal cues for acceleration and deceleration with numerical indicators of the resulting speed is recommended.
The proposed symbology may enhance pilot performance in STBO.
Contributor
Event Type
Lecture
TimeFriday, October 23rd11:20am - 11:40am PDT
Location