TABLE 5.
Examples of each theme with illustrative quotes from participant transcripts.
| Illustrative quotes derived from the SA Comprehension question categorized into sub-themes of the taxonomy | |||||||||
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| 1.1 Road/highway | |||||||||
| Traffic signs and signals | “there was a house on the right-hand side.coming… a sign saying coming… to a left hand bend. Also there was a DPD red van in front of me… past the slow sign on the road, then we came to a built up area with houses so… we slowed down to 30…” P6 RES#2 WITH | ||||||||
| Road “decoration” | “I was driving along a single lane road, going through countryside…. there were trees on either side of the road and some fences” P1 A#2 WITHOUT | ||||||||
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| 1.2 Driver’s perspective | |||||||||
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| Relative position to other cars | “There were cars to my right but none in the middle lane and there was a lorry ahead in the left lane, where I was but it was quite ahead.” P2 M#1 WITHOUT | ||||||||
| Subjective judgment of speed | “This was a country road with trees on both sides… I believe we were going a lot faster than 30 mile per hour.” P6 A#2 WITH | ||||||||
| Driver’s decision/judgment of own action | “So I am sitting there waiting. for the cars to pass on the other side of the road… waiting for a gap… for when I can pull out.” P5 RES#1 WITH | ||||||||
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| 1.3. Other drivers/vehicles | |||||||||
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| Location and state of other vehicles | “and was passing… what looked like an abandoned… van on the other side of the road.” P8 R#2 WITHOUT | ||||||||
| Rational/analysis of other driver action (theory of mind) | “I think he is trying to find out where to drop his parcel off…” P5 RES#2 WITHOUT | ||||||||
| Purpose of other vehicles | “some sort of waste truck…” P9 R#2 WITHOUT | ||||||||
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| 1.4 Dynamic actions of driver and/or other drivers/vehicles | |||||||||
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| Active maneuvers (driver) | “I waited my turn and then proceeded to indicate and go round the vehicle.” P3 RES#1 WITH | ||||||||
| Active maneuvers (other driver/vehicle) | ”the black van in front of me had stopped…” P1 A1#WITH | ||||||||
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| 1.5 Pedestrians/other road users | |||||||||
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| Location of the pedestrian/other road user relative to driver | “…there was a pedestrian walking on the left and there were cars approaching from the right…” P2 RES#1 WITHOUT | ||||||||
| Gender of the pedestrian | “A lady with a blue shopping bag walked past at the same time.” P3 RES#1WITH | ||||||||
| Action of pedestrian/other road user | “at one point a local authority worker was in an red… orange high vis on the side of the road clearing debris.” P3 R#1 WITHOUT | ||||||||
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| 1.6 Anticipatory Hazards | |||||||||
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| Keeping distance from other vehicles | “Because I’m on a bend and I had slowed down for the vehicle in front…” P 2 Res#2 WITH | ||||||||
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| Illustrative quotes derived from the SA Prediction question categorized into sub-themes of the taxonomy | |||||||||
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| 2.1 Changing road environment | |||||||||
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| Road layout perception | “To go on the bend I will be slowing down my speed and being careful to make sure that… be sure because I don’t have much visibility going around the bend.” P2 R#1WITHOUT | ||||||||
| Environmental markers | “…the vehicle will slow down to take the hump back bridge over the railway to the right… for… coming in to what I imagine is a small village or town” P3 R#1WITHOUT. | ||||||||
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| 2.2 Driver future dynamic action/s | |||||||||
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| Driver future maneuvers | “I will carry on overtaking the van and then pull back into my lane on the left hand side of the road…” P1 RES#2 WITH | ||||||||
| Driver position on the road | “I imagine that I will continue down the road in the middle lane proceeding past the… vehicles on the left, returning to the outer left hand lane…” P3 M#2 WITHOUT. | ||||||||
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| 2.3 Other vehicle/road users predicted dynamic actions | |||||||||
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| Other driver/road user future speed | “I am coming up behind a van that is going slower than me, so I will have to brake as I come up close behind the van.” P1 A#2 WITHOUT | ||||||||
| Other driver/road user future maneuvers | “… the Volkswagen golf behind me appeared to be quite close to the vehicle and may attempt to overtake” P3 A#1 WITH | ||||||||
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| 2.4 Impending hazards | |||||||||
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| Driver general caution/awareness | “I am about to drive over a hill… so I predict that I may well encounter… some form of hazard as I… go around the bend.” P7 R#1 WITHOUT | ||||||||
| Absence of hazards | “I think it will have been just a normal road with traffic on my right hand side… type of a country road… certainly going faster than 30 mile per hour, looking at the video. So, I actually don’t think anything will happen.” P6 R#2 WITHOUT | ||||||||
| Theory of mind projection to evaluate future risk | ”“I’m hoping that she doesn’t step out into the road… so I have to brake suddenly but you never know with people when they are in a bit of a dolly day dream, they might do that…” P8 Res#1 WITHOUT. | ||||||||
n.b. Notation details as follows: P refers to participant number, each video type is referenced (A#1, A#2, M#1, M#2, RES#1, RES#2, R#1, R#2), WITH/WITHOUT refers to whether the participant viewed the video with rear-view image present, or without rear-view image.