3.1. Model Selection and Parameters Setting
In terms of theoretical and methodological choice, the Technology Acceptance Model (TAM), widely recognised in the international academic community as a mainstream framework for studying technology–user behaviour, offers strong adaptability and scalability. The model is simple in structure, logically clear, and highly adaptable in terms of variables, making it widely used to study how new technologies are perceived, evaluated, and adopted by the public. Since Davis introduced it in 1989, TAM has been extensively applied in fields such as information systems, mobile internet, e-commerce, artificial intelligence, and shared mobility. Its core logic centres on two fundamental questions: whether users perceive the technology as useful and whether they find it easy to use [
42]. These two dimensions form the key starting point for shaping user attitudes and, through a behavioural intention path model, further predict actual usage behaviour. By analysing the two core constructs—Perceived Usefulness (PU) and Perceived Ease of Use (PEOU)—TAM provides researchers with a concise, effective, and easy-to-operate theoretical tool for predicting and explaining user acceptance of emerging technologies. This is especially relevant in contexts involving high uncertainty and strong risk perception, where TAM proves highly applicable in explaining the psychological process of trust building–risk assessment–acceptance decision. This explanatory power is particularly valuable in emerging domains such as autonomous driving, where uncertainty, risk perception, and trust deficits significantly influence behavioral outcomes.
In recent years, with the continuous expansion of TAM, many studies have incorporated variables such as risk perception, institutional trust, ethical judgment, and social influence. These extensions, while retaining the original model’s simplicity, enable better adaptation to complex real-world contexts, forming a flexible application paradigm of basic model plus extended variables. In the field of transportation, multiple empirical studies have confirmed TAM’s high level of fit and explanatory power in interpreting user acceptance of emerging technologies such as car sharing and autonomous driving [
18,
21,
43,
44,
45]. Its advantages lie not only in the clarity of relationships between variables and the rationality of its path design but also in its ability to integrate social variables from different cultural and institutional contexts, thereby producing a comparable and transferable analytical framework. The primary reason for selecting TAM is its simplicity and efficiency. Compared with alternative theoretical frameworks such as the Theory of Planned Behavior (TPB) and the Unified Theory of Acceptance and Use of Technology (UTAUT), TAM offers a more parsimonious structure while still capturing the essential drivers of technology acceptance. Perceived Usefulness focuses on an individual’s belief that a technology enhances efficiency or reduces workload, while Perceived Ease of Use evaluates whether the technology is easy to operate [
46,
47]. In the context of autonomous driving, Perceived Usefulness relates to public recognition of the technology’s ability to improve travel efficiency and reduce traffic accidents, while Perceived Ease of Use concerns the system’s operational simplicity and user-friendliness. These constructs provide an intuitively accessible framework that can be empirically tested across cultures, thereby enhancing the comparability of findings. These two dimensions play a decisive role in public acceptance. In studying acceptance of this emerging technology, TAM’s clear and straightforward framework allows us to identify the core factors influencing technology adoption without introducing an excessive number of complex variables and measurement items, thereby simplifying the analysis process.
While TPB and UTAUT can provide broader explanatory power, their complexity—through numerous variables and constructs—makes them less suitable for early-stage acceptance research where parsimony and clarity are critical. In contrast, TAM with targeted extensions provides a balance between theoretical robustness and operational feasibility, which is particularly important in the emerging and rapidly evolving field of autonomous driving [
48,
49]. At the early stage of studying technology acceptance, using such models may result in excessive complexity. Therefore, the simplicity of TAM makes it the most appropriate choice for current research on the acceptance of autonomous driving technology.
Another major advantage of TAM is its strong cross-cultural applicability. Although technology acceptance can be influenced by differences in regional and cultural contexts, TAM’s core constructs—Perceived Usefulness (PU) and Perceived Ease of Use (PEOU)—are highly adaptable and can effectively support acceptance studies across different cultural and social settings. Specifically, in this study, China and Europe differ significantly in cultural traditions, social structures, and policy contexts, yet TAM can provide a unified analytical framework to reveal similarities and differences in how the public in these two regions accepts autonomous driving technology [
18,
21,
43,
45]. The extension of TAM with context-specific variables is another reason for its selection. Variables such as Result Demonstrability (RD), Image (IMG), and Perceived Trust (PT) are not only theoretically grounded but also empirically relevant in the China–Europe comparative framework. RD captures observable benefits like safety enhancement and carbon reduction, which resonate strongly with European discourses on sustainability. IMG reflects the symbolic and status-related value of technology adoption, which is particularly salient in China, where technological modernisation is tied to national development narratives. PT directly addresses ethical compliance, institutional reliability, and privacy protection, which dominate European acceptance debates. Thus, the inclusion of these variables enhances the explanatory power of TAM by aligning it with the region-specific drivers of acceptance. By adding appropriate extended variables to the TAM framework, it is possible to further examine how cultural and social factors influence public acceptance of autonomous driving. This flexibility is another key advantage of TAM, allowing researchers to adjust the model according to specific research needs and to account for local cultural differences and potential barriers to technology adoption.
Therefore, due to its simplicity, effectiveness, and strong cross-cultural adaptability, TAM is the optimal choice for this study. Applying TAM to a comparative analysis of public acceptance of autonomous driving in China and Europe not only revalidates the model’s cross-cultural effectiveness but also extends its theoretical scope within the context of intelligent transportation technologies. Given the marked differences in political systems, legal frameworks, cultural mindsets, and media environments between China and Europe, the mechanisms through which the public forms attitudes toward autonomous driving may vary structurally: for example, Chinese citizens may be more influenced by policy guidance, industry application scenarios, and positive incentives from infrastructure deployment, whereas European citizens may place greater emphasis on ethical legitimacy, privacy protection, and clear institutional accountability. Conducting variable comparisons and path analyses within a unified model framework enables the identification of significant perceptual differences between the two regions and provides insight into the institutional roots of these differences. This study, through its updated data, focused research questions, and deliberate model choice, responds to the urgent needs and contemporary challenges of autonomous driving research. By integrating TAM with a China–Europe comparative perspective, it seeks not only to offer an analytical approach capable of explaining cross-cultural differences in public acceptance but also to provide theoretical support and policy references for technology promotion strategies, public risk communication mechanisms, and institutional design.
Against this background, this study designs variables within the PU (Perceived Usefulness) dimension focusing on three types of benefits: Result Demonstrability (RD), Image (IMG), and Perceived Trust (PT). First, the RD variable primarily addresses users’ perceived utility of autonomous driving technology in improving travel efficiency, reducing traffic accidents, and enhancing environmental quality. Previous studies have indicated that autonomous driving systems can improve traffic efficiency and save travel time through intelligent route planning and vehicle-to-everything (V2X) functions [
50]. In addition, autonomous driving systems can effectively reduce empty trips and optimize route selection through intelligent scheduling, thereby significantly contributing to energy conservation, emission reduction, and the realization of green travel goals. Consequently, environmental factors have become an important dimension influencing perceived usefulness [
39,
51]. Second, the IMG variable reflects users’ perception of the symbolic meaning of autonomous driving technology as a marker of technological progress. Related studies have shown that some users view the adoption of autonomous driving as a way of keeping up with technology and participating in the future of mobility [
52]. This sense of status recognition, when incorporated into an extended TAM model, serves as an important socio-psychological mechanism affecting perceived usefulness and behavioral intention. Third, the PT variable emphasizes users’ concerns about technological legitimacy, data privacy protection, and ethical controllability—dimensions that have become increasingly salient in countries like China, where autonomous driving technology is being rapidly deployed. Previous research has shown that when evaluating whether a technology is worth adopting, users not only consider whether it is “useful” but also whether it is compliant, controllable, and respectful of privacy. This makes ethical and legal norms an essential component in constructing perceived usefulness [
24,
53].
In the PEOU (Perceived Ease of Use) dimension, this study constructs a variable system from three perspectives: Perceived External Control (PEC), Perceived Enjoyment (ENJ), and Computer Anxiety (CANX). First, PEC emphasises users’ perceived ease of use within their operational environment, such as whether there is adequate policy and regulatory support, well-developed road infrastructure, and clear, accessible user guidance. Empirical studies have also confirmed that this factor is highly applicable in research on autonomous driving acceptance [
34,
54]. According to a study by Guler et al. in 2024, The scale, distribution, and service efficiency of infrastructure—such as charging networks—are critical factors influencing whether EV users are willing to adopt and utilize electric mobility technologies. These elements serve as essential variables shaping user intention and satisfaction, implying that even if EV technologies themselves reach sufficient maturity, inadequate infrastructure may still result in user rejection [
55]. Consequently, it can also be inferred that if infrastructure development lags behind, autonomous driving technologies, regardless of their technical maturity, may likewise struggle to gain widespread public acceptance. Second, ENJ focuses on users’ sensory and emotional experiences during use, such as whether autonomous driving offers greater comfort, entertainment facilities, or the ability to free one’s hands and experience enjoyment. Such motivations are receiving growing attention in the transportation sector [
56,
57]. Third, the CANX variable addresses users’ trust in the operational stability and emergency handling capabilities of autonomous driving systems, particularly concerns about system failures or being forced to take control in uncertain situations. Xu has pointed out that the safer autonomous vehicles are, the stronger users’ overall willingness to accept them [
58], and Dong’s research also indicates that when vehicles operate under higher levels of regulatory oversight, respondents’ willingness to accept autonomous driving increases [
54].
In the Behavioural Intention (BI) dimension, this study designs three categories of measurement items, focusing respectively, on users’ usage tendency, choice priority, and willingness to engage in word-of-mouth promotion. The BI measurement is not only used to determine whether users are willing to incorporate autonomous driving into their daily travel routines, but also whether, when choosing among different transportation options, they would prioritise autonomous driving solutions, and whether they are willing to actively recommend this technology to others. In an empirical study comparing the acceptance of autonomous driving between Chinese military personnel and civilians, Wan and Peng found a highly significant positive relationship between perceived usefulness (PU) and behavioral intention (BI) [
21]. Perceived ease of use (PEOU), on the other hand, tends to influence BI indirectly through PU, while users’ recommendation willingness often reflects their overall recognition of the technology, making it a strong predictor and a key factor in social diffusion [
21].
In summary, the measurement variables in this study are constructed strictly in accordance with the logical pathways of the TAM model, while incorporating social value, ethical perception, and emotional variables unique to the autonomous driving context. Based on the above analysis and the summary of the above quotations, The inclusion of PU, PEOU, RD, IMG, PT, ENJ, PEC, CANX, and BI as core variables in this study is theoretically sound and methodologically justified. PU and PEOU are fundamental constructs in the Technology Acceptance Model (TAM), ensuring the framework’s consistency and comparability with prior research. The integration of RD and IMG reflects both the functional demonstrability of autonomous driving benefits and the symbolic value of technological adoption, extending the model into social–psychological dimensions. PT captures the rising significance of trust, legality, and ethical norms in shaping acceptance, which has become particularly salient in the era of data-driven mobility. On the ease-of-use side, ENJ addresses the affective experience of autonomous driving, while PEC highlights the enabling role of institutional and infrastructural support, both of which are critical in real-world deployment. CANX represents users’ cognitive and emotional barriers, especially their concerns about uncertainty and loss of control, offering a necessary counterbalance to positive predictors. Finally, BI serves as the ultimate outcome variable that integrates intention to adopt, priority of choice, and word-of-mouth promotion, thus directly linking perceptions to actionable behavioral patterns. Collectively, these variables form a coherent and comprehensive measurement system that not only aligns with the TAM’s theoretical foundation but also extends its applicability to the unique socio-technical challenges of autonomous driving.This ensures that the variable system not only maintains the theoretical consistency of the model but also fully addresses the complex needs arising in practical application scenarios. By systematically measuring the three major dimensions—PU, PEOU, and BI—this study can comprehensively reveal Chinese consumers’ acceptance logic toward autonomous driving technology, providing both theoretical support and practical insights for relevant policy-making and technology promotion.
3.3. Accordingly, the Following Hypotheses Are Proposed
Hypothesis 1. If autonomous driving technology can improve my travel efficiency and convenience, I will be more willing to choose to use autonomous driving technology.
Hypothesis 2. If autonomous driving technology can reduce the occurrence of traffic accidents, I will be more willing to accept this technology.
Hypothesis 3. If autonomous driving technology can reduce carbon emissions and improve the environment, I will be more willing to accept this technology.
Hypothesis 4. If adopting and using autonomous driving technology allows me to feel aligned with cutting-edge technology, I will be more willing to choose it.
Hypothesis 5. If the use of autonomous driving technology reflects my recognition of technological innovation, I will be willing to accept it.
Hypothesis 6. If using autonomous driving technology symbolises my support for technological development and social progress, I will be more willing to try and accept this technology.
Hypothesis 7. If autonomous driving technology is fully regulated in terms of legal and ethical safeguards, I will be more willing to trust the safety of this technology.
Hypothesis 8. If autonomous driving technology can handle ethical dilemmas in accordance with widely accepted ethical frameworks, I will find it easier to accept the use of autonomous driving technology.
Hypothesis 9. If autonomous driving technology fully protects users’ privacy rights and takes measures to ensure data security, I will find it easier to accept the technology.
Hypothesis 10. If the government provides sufficient policy support and introduces corresponding laws and regulations, I will consider it easier to use autonomous driving technology.
Hypothesis 11. If companies and manufacturers related to autonomous driving technology provide detailed and reliable usage guidance and technical support, I will find it easier to get started with using autonomous driving technology.
Hypothesis 12. If local infrastructure—such as intelligent traffic signals and dedicated lanes—has been prepared for the application of autonomous driving technology, I will find it easier to accept using autonomous driving for travel.
Hypothesis 13. If I can gain more enjoyment from using autonomous driving compared to traditional driving, I will be more willing to accept and use autonomous driving systems.
Hypothesis 14. If using autonomous driving technology can provide higher comfort compared to traditional transportation modes, I will be more inclined to choose this technology.
Hypothesis 15. If autonomous driving technology can offer more diverse in-car entertainment options, such as in-car cinemas or gaming consoles, I will be willing to try it.
Hypothesis 16. If I feel nervous and anxious while using autonomous driving technology due to the need to constantly pay attention to whether I need to take over the vehicle, I may avoid using the technology.
Hypothesis 17. If the autonomous driving system cannot respond promptly to emergencies when it malfunctions, I will develop doubts and resistance toward autonomous driving technology.
Hypothesis 18. If autonomous driving technology proves to be highly effective in improving travel efficiency, reducing accidents, and enhancing the environment, I will consider it a technology worth accepting and using.
Hypothesis 19. If the autonomous driving system is not only technologically advanced but also equipped with clear legal liability allocation and ethical standards, I will regard it as a trustworthy mode of transportation.
Hypothesis 20. If autonomous driving technology in practical application can both reflect the development of science and technology and improve travel experiences, I will be more inclined to view it as a technology worthy of large-scale adoption.
Hypothesis 21. If I can obtain clear and understandable operational guidance and scenario demonstrations before using autonomous driving technology, I will find it easier to understand and accept how to use the technology.
Hypothesis 22. If the autonomous driving system can operate autonomously, steadily, and safely under normal driving conditions without causing me to feel continuously tense or overly alert, I will consider it suitable for daily use.
Hypothesis 23. If the deployment of autonomous driving technology receives policy support, is accompanied by cooperative infrastructure, and is supported by public education, I will find it easier to accept the usage scenarios of this technology.
Hypothesis 24. If I maintain confidence in the reliability, safety, and user experience of autonomous driving technology, I will be willing to include it in my daily travel choices.
Hypothesis 25. If in the future, when facing multiple transportation tools or travel options, there are mature and reliable autonomous driving products that can meet my actual needs, I will prioritise them over traditional options.
Hypothesis 26. If I believe that autonomous driving technology has clear advantages in travel experience, ease of use, or social benefits, I will actively recommend it to people around me who are considering trying autonomous driving technology and will be willing to share my actual experiences with it.