Conference proceeding
Driver eye scanning behaviour when reading symbolic warning signs
VISION IN VEHICLES - VI, pp.3-11
1998
Abstract
Video taped eye fixations and saccades were analysed for a total of 80 (32 night time, 48 daytime) young, healthy unfamiliar drivers, driving along a rural two lane highway in Ohio, either under daytime or under night time (low beams) conditions for the approach to a yellow diamond shaped curve or turn warning sign with a black curve/turn arrow symbol. The first-look distance (longitudinal distance measured from the sign to a driver's eyes at which a driver starts to foveally fixate the sign for the first time), last-look distance (the distance measured from the sign to a driver's eyes where he/she moves the eyes away from the sign for the last time before reaching the sign), number of looks and durations of looks at the warning sign were of main interest in this study. The results of this study show that there are, in general, no major eye scanning behaviour differences for reading these types of symbolic warning signs between the daytime and the night time conditions. Further, the results of this study and a previous similar study indicate that drivers look on the average about two times at a symbolic warning sign during the approach. It was found that between the first-look (information acquisition) and the last-look (confirmation) at a sign there was usually at least one eye fixation on the roadway ahead. Using cumulative eye fixation duration data obtained for straight road driving published in other studies and an average saccade duration of 0.03 seconds, a symbolic warning sign reading distance model was used for daytime and night time which determines the distance (minimum required legibility distance, MRLD) at which a simple, bold symbol on a symbolic warning sign must be legible. The model provides for a given speed the overall cumulative probability distribution function for the MRLD in terms of distance or in terms of time. The advantage of this model for symbolic warning sign reading behaviour is that it is totally based upon recorded and analysed driver eye scanning and information-seeking behaviour observed in the field.
Details
- Title: Subtitle
- Driver eye scanning behaviour when reading symbolic warning signs
- Creators
- H T ZwahlenT Schnell
- Contributors
- A G Gale (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- VISION IN VEHICLES - VI, pp.3-11
- Language
- English
- Date published
- 1998
- Academic Unit
- Industrial and Systems Engineering; Neurology; Electrical and Computer Engineering; Occupational and Environmental Health; Mechanical Engineering; Public Policy Center (Archive)
- Record Identifier
- 9984239285802771
Metrics
19 Record Views