TABLE 4.
Total proportion of references to each theme and the frequency (%) at which each of the sub-themes were referenced within each theme.
| SA Comprehension Macro and micro category list | Total proportion of references | ||||||||
|
| |||||||||
| 1.1 Road | 30% | ||||||||
| Type of highway | Road description | Type of area | Road layout | Road layout (adjective) | Time of day/season | Traffic signs | Road “decoration” | ||
|
| |||||||||
| 23.5% | 19.6% | 5.2% | 27.8% | 1.7% | 0.9% | 11.7% | 9.6% | ||
|
| |||||||||
| 1.2 Driver’s perspective | 21% | ||||||||
|
| |||||||||
| Relative position to other cars | Direction/trajectory of driver | Speed traveling at | Subjective judgment of speed | Driver’s decision/judgment of own action/s | Rationale of judgment of own action/s | Driver perception issues | |||
|
| |||||||||
| 41.9% | 26.3% | 5.6% | 3.1% | 7.5% | 12.5% | 3.1% | |||
|
| |||||||||
| 1.3 Other drivers/vehicles | 21% | ||||||||
|
| |||||||||
| Description | Speed traveling at | Direction/trajectory | Purpose of vehicle | Location of vehicle | State of vehicle | Rationale/analysis of other driver action (theory of mind) | |||
|
| |||||||||
| 55.2% | 4.2% | 10.9% | 6.1% | 12.1% | 8.5% | 3.0% | |||
|
| |||||||||
| 1.4 Dynamic actions of driver and/or other drivers/vehicles | 23% | ||||||||
|
| |||||||||
| Maneuver planning | Active maneuvers | Observation | |||||||
| Driver | Other driver/vehicle | Driver | Other driver/vehicle | Driver | Other driver/vehicle | ||||
|
| |||||||||
| 13.7% | 0.6% | 66.9% | 16.0% | 1.7% | 1.1% | ||||
|
| |||||||||
| 1.5 Pedestrians/other road users | 5% | ||||||||
|
| |||||||||
| Presence of pedestrian/other road user | Location of pedestrian/other road user | Location of pedestrian/other road user relative to driver | Description of pedestrian/other road user | Gender of pedestrian/other road user | Age of pedestrian/other road user | Action of pedestrian/other road user (what pedestrian is doing) | Purpose of action of pedestrian/other road user (why they are doing it) | Occupation of pedestrian/other road user | |
|
| |||||||||
| 22.9% | 5.7% | 20.0% | 17.1% | 11.4% | 2.9% | 17.1% | 2.9% | 2.9% | |
| 1.6 Anticipatory Hazards | 1% | ||||||||
|
| |||||||||
| Keeping distance from other vehicles | Watching out for other vehicles’ behavior | ||||||||
|
| |||||||||
| 75.0% | 25.0% | ||||||||
|
| |||||||||
| SA Prediction Macro and micro category list | Total proportion of references | ||||||||
|
| |||||||||
| 2.1 Changing road environment | 13% | ||||||||
|
| |||||||||
| Road layout perception | Environmental markers | Changing road details | Traffic signs ahead | ||||||
|
| |||||||||
| 40% | 9% | 36% | 15% | ||||||
|
| |||||||||
| 2.2 Driver future action/s | 43% | ||||||||
|
| |||||||||
| Driver future observation | Driver future maneuvers | Driver future orientation/trajectory | Driver future speed | Driver position on the road | Reaching destination | ||||
|
| |||||||||
| 4% | 49% | 21% | 12% | 9% | 6% | ||||
|
| |||||||||
| 2.3 Other vehicle/road user predicted actions | 25% | ||||||||
|
| |||||||||
| Other driver/road user future maneuvers | Other driver/road user future trajectory | Other driver future speed | Position relative to driver | Location of other vehicle/road user | Description of other vehicle/road user | Purpose of other vehicle/road user | |||
|
| |||||||||
| 15% | 1% | 10% | 26% | 6% | 40% | 1% | |||
|
| |||||||||
| 2.4 Impending hazards | 19% | ||||||||
|
| |||||||||
| Driver general caution/awareness | Specific potential hazards | Location of projected hazard | Abstract/hypothetical hazards | Absence of hazards | Theory of mind projection to evaluate future risk | ||||
|
| |||||||||
| 23% | 41% | 4% | 15% | 15% | 2% | ||||