Table 3.

Number of comments, ChatGPT summaries, and manually selected comments for systems mentioned in Q30 and Q34.

Category	Count	GPT-4 response and manually selected quotes
Adaptive cruise control (ACC)	74	The opinions on the Adaptive Cruise Control (ACC) system among users are mixed. Some praise it for its convenience, safety enhancements, and fuel-saving potential, appreciating its ability to maintain distance and assist in driving. Others criticize it for causing unnecessary braking, reacting to non-hazardous objects, and potentially leading to decreased driver attentiveness and reliance on technology. Concerns are also raised about its effectiveness in heavy traffic and interactions with other drivers’ unpredictable behaviors. Overall, while many see the benefits of ACC, there are significant concerns about its current implementation and impact on driving habits.
		“Wouldn’t want to miss the ACC … anymore!” “Some aids also react to other situations like adaptive cruise control that also reacts to viaducts traffic signs and then it makes an emergency stop out of nowhere also extremely dangerous” “Certain aids are fantastic, but some also promote inattentiveness such as ACC.”
Lane departure warnings (LDW)/Lane keeping assistance (LKA)	25	The users generally find the lane assist or line detection system to be annoying, irritating, and often unnecessary. They express frustration with false alarms and the system’s intrusiveness, with some preferring traditional driving methods without such interventions.
		“Lane assist is mega annoying and I turn it off when I’m fit. Later in the day, it comes on.” “You get insanely annoyed by all those alarms. Especially from that line detection. 9 out of 10 times it goes off for no reason.” “Line detection … encourages you to pick up your mobile. And all that touchscreen stuff only takes the eyes off the road. Just give me press and twist buttons. The more stuff on a car the less alert people are. If something suddenly happens, people no longer know how to intervene.”
Emergency braking/AEB	58	The users express significant concerns and dissatisfaction with the automatic emergency braking systems in vehicles, particularly trucks. They report that these systems often activate inappropriately, responding to non-hazards like traffic signs, reflections, or even shadows, leading to dangerous and unexpected braking situations. While a few see the potential safety benefits, the majority criticize the systems for creating more risks than they mitigate, especially in situations where following drivers are caught off guard by sudden stops. There’s a general sentiment that these systems need improvement to truly enhance road safety.
		“Yes absolutely. My truck automatically brakes in an emergency situation. If it ever comes to the point where every truck has this technology (mandatory), then at least no truck will ever run into the back of a stationary traffic jam.” “I turn them off. Almost had an accident because the truck went full on the brakes in a slight curve at 80 km/h. The automatic braking system was triggered because my own light (headlights) reflected on a traffic sign.” “Some systems are downright life-threatening. For example, the emergency braking system, when you are cut off by a motorist, the system goes into action causing a great chance that your follower will shoot under your trailer.”
Camera systems and smart mirrors	58	The users express mixed opinions about the use of camera systems in vehicles. Some appreciate the enhanced visibility and safety features cameras provide, such as reducing blind spots and aiding in maneuvers like reversing. They find cameras, including blind spot and reversing cameras, to be helpful tools that can prevent accidents. However, others raise concerns about reliability issues, such as cameras being affected by weather conditions or failing to accurately reflect depth. There’s also a sentiment that reliance on cameras can lead to decreased attention to traditional driving practices, like using mirrors and making eye contact with other drivers, potentially reducing interaction with other traffic and increasing distraction. Overall, while many see the benefits of camera systems for safety and visibility, there are significant reservations about their effectiveness and impact on driving habits.
		“I have a camera system etc. for London on my car, this camera greatly reduces my blind spot and I now see much more on the highway but also on roundabouts and through cities.” “… Some camera systems can help. Cameras instead of mirrors, not so much, because you lose visual contact with other road users.” “Camera mirrors do not reflect depth and when it rains you see nothing and they break quickly.”
On-board computer	625	The users have mixed feelings about the system, with some seeing it as a helpful tool that can make work more efficient and reduce the need for constant communication with the planning department. Others feel it increases work pressure by allowing for constant monitoring and adding more tasks, leading to a sense of being constantly watched and reducing personal freedom. Some users also mention the system can be distracting and contribute to stress, especially when it leads to additional administrative tasks or when planning uses it to push for more work to be done in less time.
		“It depends on how the on-board computer is used. You as a driver and on the other side the planning that provides you with work. If there is good consultation with the planning, then the on-board computer is also an addition that could bring peace.” “You are continuously monitored, if you are ahead of schedule then extra loading addresses are added.” “… The on-board computer does take away the so-called “sense of freedom” although I have complete understanding for the need to account for hours.”