1. Introduction
Pursuing effective policy intervention approaches involving urban parking management is necessary as cities face the manifold challenges due to the mismatch between the increased private vehicles and limited parking sources, such as traffic accidents caused by occupying pedestrian and driving lanes and the low capacity of vehicle lands caused by unorderly parking. The rapid development of the economy steers a continuous increase in vehicle numbers that places huge pressure on urban parking. For example, the number of motor vehicles in China has reached 393 million up to November 2021, according to the Ministry of Public Security, which is 1.64 times that of ten years ago. However, the deficit in the parking berth was over 80 million in 2020, reported by
People’s Daily [
1]. The mismatch between parking supply and demand requires extra time for drivers to find a proper parking space, particularly in the urban core of a metropolis. Shoup et al. found that most people need to take eight minutes at least, and almost 30% of cars are cruising to find a parking space [
2]. Meanwhile, the current studies argue that additional cruising causes serious carbon emissions and has a negative impact on both the operation of the urban network and the environment [
3,
4].
Shared parking, initiated in the USA, was considered and proved to be an effective approach to cope with the mismatch because it is hard for parking infrastructure to catch up with the increased demand for parking [
5]. The concept of shared parking is also getting the bulk of attention from cities with limited parking resources. So, as to China, a national document of “Opinions on Promoting the Development of Urban Parking Facilities” was officially issued by the General Office of the State Council in May 2019, a parking resource for government agency departments in which enterprises and institutions were encouraged to open to the surrounding residential community so as to stimulate commercial facilities, office buildings, and other parking facilities to share parking resources in a staggered time way. The scientific and reasonable realization of the staggered shared parking policy will be an obvious concern for the city’s traffic management [
6]. Following the advice of the higher authorities, Beijing has carried out practical work since 2019, and it has been four years of work up to now. The original intention of its work aimed to solve the problem of parking in residential areas, whereas in the process of implementation, the problem of chaos behavior emerged, such as the battle for parking spaces and the illegal occupation of parking, while waiting for a better solution to handle it. To explore the subject, our group has conducted a follow-up evaluation study on the implementation process of Beijing’s staggered shared parking policy.
Generally speaking, parking can be divided into two types of service, which are the trip part and the residential part. The trip aspect refers to the demand for parking at places where people visit for work, consumption, entertainment, medical, educational, etc. The residential aspect refers to the need to park vehicles in residential areas outside of travel, focusing on the residents parking their private vehicle for long periods of time at night. The scope of the review of our paper therefore focuses on the shared park on the trip side and residential side.
For the trip side of shared parking, many scholars focus on the combination of qualitative and quantitative methods. The existing studies focus on improving the efficiency of parking resource allocation, developing reasonable parking pricing schemes, and designing shared parking operation models, and a small quantity of the research is on the intention of shared parking use, among other aspects [
7,
8]. Scholars, led by Yao Enjian [
9] and Duan Manzhen [
10], found that urban parking resources are characterized by complementary relationships and have been devoted to researching many methods to optimize the matching of urban parking resources. Scholars [
9,
10,
11,
12,
13] firstly proposed optimal allocation algorithms and matching strategies and subsequently [
14,
15,
16,
17] proposed multiple kinds of supply and demand matching optimization models based on different research targets. A number of scholars [
11,
18,
19,
20,
21] studied the theoretical model of shared parking regarding the price cost, by reasonably allocating the revenue, developing the price mechanism, etc. Lai Minghui et al. [
22] focused on the design of shared parking systems, attempting to promote the development of the shared parking field through technological enhancements. In recent years, scholars, such as Xie J [
23], Yan Q [
24], and Ange W [
25], introduced psychological theoretical models to explore the usage intentions of shared parking users, providers, and managers, focusing on the intrinsic influencing elements of shared parking behavior.
In China, however, the residential portion of shared parking is typically characterized by its strong public interest, not just for commercial gain. A certain amount of research work gives us good inspiration, such as through the analysis of the current state of shared parking, to propose policy recommendations and price models to estimate benefits [
25]. Through the construction of the demand prediction model, the sharing strategy was proposed [
26], and psychological methods were used to detect the behavioral intentions of shared parking suppliers and demanders. Luo Qiuxia [
27] analyzed the influencing factors of the shared parking choice using a combination of quantitative and qualitative methods (the LOGIT model and structural equation model). Jyun-Kai Liang et al. [
28] explored the intention of parking space providers and demanders to participate in shared parking based on the C-TAM-TPB model; while using the same theoretical approach, Yu Ning et al. [
29] investigated the acceptance of drivers. Subsequently, scholars, such as Jin Xie [
23], explored the impact of other latent variables, expanding the TPB model on shared parking in residential areas. It can be seen that the scholars’ research on the acceptance of shared parking in residential areas plays a crucial role in government strategies. However, there is no direct study of the impact mechanisms for the advancement of shared parking policies in residential areas. And this existing research on residential shared parking cannot match the dual attribute of commonweal and profit. Often, for complex social issues of parking, policy recommendations should be explored more from the actual practice of policy advancement. Therefore, we synthesize the experiences of research authors and explore the relationship among the participating subjects, residents, enterprises, and government, based on experiments of actual staggered shared parking policies. We analyze the intrinsic potential influences on the advancement of policy by utilizing psychological models.
Given the positioning characteristics of China’s staggered shared parking policy, this paper is dedicated to complementing urban parking management issues under different social systems. In the Chinese institutional environment, most of the current staggered shared parking policy is led by the government. The core purpose is alleviating the problem of difficult nighttime parking for residents in residential areas. Specially, the establishment of China’s staggered shared parking policy has the characteristics of both market and livelihood attributes. Therefore, the successful implementation of the policy requires the joint efforts of multiple actors. Among them, the government is in an indispensable leading role, the active participation of enterprises is important, and residents accept and use the shared parking spaces. Considering the diversity of the interests of the different participants involved, it is crucial to explore the intentions of each participant in the decision of this behavior. These experiences and inspirations are also very helpful for other cities with limited parking resources to carry out urban traffic governance [
30].
From examples of policy practice, our innovative objective in this study is to address the following two aims: (1) To deal with the problem of residents’ difficulty in parking at night and to explore the underlying mechanisms that influence residents’ participation in staggered shared parking policies. (2) To select companies that possess available parking resources within the surrounding residential areas and to explore the intrinsic mechanisms that influence the enterprises providing the staggered shared parking spaces. Thus, it helps to inform the government’s policy-making decisions and management.
Following these aims, this paper explores the influence mechanism of an urban staggered shared parking policy on the behavioral intentions of users and providers based on the existing expanded theory of planned behavior. On the one hand, it combines the technology acceptance theory and theory of planned behavior to explore residents’ willingness to use staggered shared parking. On the other hand, a benefit–risk analysis is combined with the theory of planned behavior to explore the willingness of companies to provide staggered shared parking. An analytical model is constructed to analyze the game relationship between the providers and users in the practice of staggered shared parking policies. Ultimately, the aim is to provide scientific and effective recommendations for the government to promote staggered shared parking policies.
This paper is organized as follows. In
Section 2, we present the theory introduction and propose the theoretical framework and research hypothesis. In
Section 3, the measurement instrument and survey data content are presented. The empirical analysis and results are given in
Section 4. Finally, a discussion of the findings and the conclusions of the study are provided in
Section 5.
3. Methodology
3.1. Measurement Instrument
Our team previously investigated the factors influencing the implementation of Beijing’s staggered shared parking policy based on rooting theory. Based on the obtained impact spectrum of the implementation of the staggered shared parking policy and previous research [
43], it can be seen that the three parties maintain the different interests. Among them, residents, as users, are more concerned about the price, convenience, and safety in the process of using staggered shared parking. Companies, as providers, consider more about the benefits (both social and economic), the costs [
29] (including equipment upgrades, personnel management), the risks, and the pressure they bear by providing parking spaces. The government, as the leader of both, is responsible for the coordination and coherence. On the basis of the results obtained above, we designed the investigative content of this paper by drawing on the existing hypothesis model and expert design ideas. In this paper, two questionnaires were designed for different respondents from enterprises and residents. The questionnaire consists of two parts; the first part is an individual (business) information survey to investigate the attributes of individuals involved in the staggered shared parking policy. The other part is the engagement intention survey, which investigates the potential psychological factors that influence users to make decisions, as shown in
Table 1 and
Table 2. Five-point Likert-type scales, ranging from 1 (indicating “strongly disagree”) to 5 (indicating “strongly agree”), were used to rate the items. Experts and a few students were found to pre-research the questionnaire, adjust the content and the order of the questions to form the final release questionnaire. Based on the two hypothetical models designed in this paper, the latent variables of the research problem are addressed separately. Researching the demander impact factors using the combined TPB and TAM models, a total of 20 measures were designed; specific details are shown in
Table 1. Provider studies, using a combined TPB and BRA model, with 23 measurement items, including latent variables ATT, SN, PBC, PR, PB, UI.
3.2. Survey and Data Collection
This research was approved by the institutional review board members and the questionnaires were obtained with the consent of the respondents. To ensure the validity of the questionnaire results, the questionnaire was guided by instructors and professors with relevant questionnaire design experience during the questionnaire design stage. Pre-research was also carried out, and more than 20 students and teachers were invited to pilot the questionnaire, with the purpose of finding errors in the questionnaire and the questions of items that expressed unclear meanings. After the deletion and modification of the questionnaire items, the questionnaire was ultimately formed for residents and enterprises, respectively. The questionnaires were both designed to include two parts, where the first part of the questionnaire for residents is the demographic information of the respondents (no private privacy questions), such as age group, education level, participation in shared parking status, parking usage time, etc. The second part is residents’ intention to use staggered shared parking, which covers the measurement of variables in C-TPB-TAM, including ATT, SN, PBC, PU, PEOU, UI. For companies, the first part of the questionnaire is the company attributes, company participation status, company parking status, etc. The second part is a survey on the company’s willingness to share staggered shared parking spaces, for which the C-TPB-BRA items cover 6 dimensions in terms of ATT, SN, PBC, PR, PB, UI.
Relying on the implementation project of Beijing’s staggered shared parking policy, during the interviews with enterprises and residents, this paper adopts an interview-type questionnaire to investigate the participation intention of enterprises and residents to achieve a more realistic survey result. The survey population is residents and corporate employees in the core urban area of Beijing. Because the implementation of staggered shared parking is already underway in the survey area, the survey population has some knowledge and awareness about that behavior to easily understand the original intent of the policy. Hence, respondents completing the self-administered questionnaire easily understood the short explanation and were less likely to have problems filling in the answers. The information of the questionnaires was collected and organized. Then, the acquired questionnaires were screened to exclude inauthentic (mainly data with all identical 5-level scale scores) and incomplete questionnaires to yield the valid data. A total of 323 and 240 questionnaires were obtained for enterprises and residents, respectively, with 282 and 211 valid questionnaires and yielding an effective rate of 87.3 and 87.9%.
3.3. Survey Data Statistics
When exploring factors that influence a certain behavioral decision, demographic characteristics information needs to be investigated prior to the willingness scale survey. Previous research indicated that the demographic variables show a consistent correlation with intention to evaluate to some extent [
28,
29]. This paper explores the factors influencing the implementation of staggered shared parking policies and investigates the opinions of both residents and businesses. For residents as demanders, the information on demographic characteristics and family parking demand were conducive to understanding the psychological activities of resident’s acceptance of policy specific operations and willingness to participate. Demographic variables of residents included gender, age, education level, the staggered shared parking participation, and family vehicle usage condition. The demographic information of the residents is listed in
Table 3.
Among these participants, 137 were male (64.9%) and 74 were female (35.1). Most of the participants were young people (age range from 18 to 30), 49.8 percent of investigators, followed by the middle-aged group (33.2%) and people over 46 years old (17.1%). Participants have a high level of education, 41.6 percent of them with bachelor’s degree and 46 percent of them over the bachelor’s degree. A total of 114 participants (54.0%) expressed one’s willingness to participate in the system although not involved, 70 (33.1%) had experience in the use of the staggered shared parking system, and the least number of them has no willingness. The survey on parking requirements of participants‘ families is as follows. None of the participants were non-car-owning household. Generally, the majority of them owed one car (87.2%), multi-car families (two or more cars) were a minority (12.8%). Their car price on the high side, the proportions of the vehicle prices from low to high is under 100,000 CNY 8.1%, 100,000–300,000 CNY 51.2%, 300,000–500,000 CNY 19.4%, and over 500,000 CNY 13.7%, respectively. Residents’ parking demand shows different characteristics during weekdays and holidays. During the working day, more than half of the respondents (n = 108; 51.2%) reported that it takes 6–8 h to park their vehicles at home, and 88 residents (41.7%) believe that parking time more than 8 h. During the holidays, almost all survey respondents (n = 179; 84.8%) felt that they parked their vehicles at home more than 8 h. And only a small number of participants (15.2%) have parking time less than 8 h.
For the enterprise as the supplier in the staggered shared system, the utilization of parking resources within the enterprise is an objective factor influencing behavioral decisions. The specific information is shown in
Table 4. It is considered that different types of parking lot operation models have different interests in this policy implementation process. In the questionnaire survey, the existing parking lot operation management types are divided into self-own parking property management companies, non-property rights parking management companies, and authorities’ enterprises and institutions, respectively, the proportion is 32.3, 31.6, and 36.2%. Among the respondents, most of the enterprises (n = 193; 68.5%) have participated in the policy, while more than half of them (n = 104; 36.9%) indicate that they have withdrawn. A total of 89 participants (31.6%) intend to supply their parking resources for residents’ use. Due to the working properties of the enterprise, the enterprises’ internal parking resources are dedicated to addressing the parking needs of employees during the workday. The core purpose of the policy is to make use of the unused resources of corporate parking at night to compensate for the demand of residents for night parking. The survey data confirmed the feasibility of the study in this paper. The usage of company parking is tight during the day on weekdays, with 156 respondents (55.3%) indicating that parking lot vacancy rate is between 20 and 50, and 80 respondents (28.4%) indicating that there are no available parking spaces. On the contrary, the night parking idle rate exceeds 50 and accounted for 20%; 20–50% accounted for 42.9%. During the daytime of the holiday, the parking lot idle situation is, respectively, 20–50% (37.6%), within 20% (35.1%); while parking resources are extremely abundant at night, nearly all participants (n = 241; 85.5%) reported parking availability was above 50 percent.
Subsequently, this paper uses SPSS 26.0 (IBM, Armonk, NY, USA) to analyze the reliability of the scale questionnaire. And structural equation modeling was constructed by used AMOS 26.0 (IBM, Armonk, NY, USA) to test the hypothesis model fitness and ultimately analyze the association among the potential variables of the model.
5. Discussion and Conclusions
5.1. Governmental Explanation
The initial intention of the staggered shared parking policy is dedicated to solving the problem of difficult parking for residents living at night. The policy relies on government forces to promote the active use of residents and the active participation of businesses in providing parking resources. Yu Ning [
29] pointed out that the countermeasures from the government level are of great importance to help develop an initial but substantial push for the generation of domino reactions. This paper attempts to use the theory of planned behavior extended model to explore the core factors in terms of exploring the factors influencing the behavioral intentions of the users and providers of the policy regarding participation in the policy. We tracked the implementation process of the policy and develop a hypothetical model for the research, including a questionnaire survey and an analysis of the model. Based on the above research results, we provide the government with referenceable and scientific recommendations for policy implementation.
For participants, PBC showed the strongest influence on residents’ behavior in using the staggered shared parking policy. Meanwhile, PU and PEOU play a non-negligible positive role in the overall impact (including the direct and indirect effects) of UI. To further explore the observed variables of the potential variables, firstly, the government needs to pay attention to the political advocacy in a way that is easy for residents to understand. The purpose is to enable residents to understand the procedure for using the policy, the conditions of use, and the ways to participate. Among them about the use of operations here are different from previous studies [
54] using new technology techniques; this paper focuses more on the offline contact community to complete the participation behavior of the staggered shared parking policy. Second, to visualize the direct benefits that can be gained from participation in the policy, the results of the study show that the most important factors influencing residents’ parking needs include the time, distance, cost, and comfort of finding a parking space and completing the act of parking. Based on residents’ concerns, the government attempts to match residents with the optimal staggered shared parking spaces with multi-dimensional trade-offs.
For providers, ATT was shown to have the strongest influence on UI, and the next major influence is the SN. At the same time, firms’ attitudes are significantly influenced by predictable perceived risks and perceived benefits, which ultimately contribute jointly to behavioral intentions. It is clear that companies take the government’s attitude seriously [
55]. As companies weigh the pros and cons of participating in this policy, the role of government in promoting active business participation is indispensable. In order to increase business engagement, the underlying logic is to reduce business risk as well as enhance potential benefits [
20,
29]. On the one hand, the government develops the incentive mechanisms. The participation of companies can be stimulated with the ability to provide parking spaces through subsidies [
23], corporate reputation, social contribution, etc. On the other hand, the government should assume the credit endorsement for the residents. Yu Ning [
29] recommended that a user integrity mechanism could be built and the residents who violate the regulations can be penalized to avoid a crisis of trust if users do not remove their vehicles beyond the shared time, users enter corporate offices privately, etc. All of these potential problems require a credible government to endorse residents, thus increasing business trust [
28,
55].
5.2. Theoretical Implications
This study provides theoretical applications on the impact of policy implementation in the shared parking field. In previous studies, psychological models (such as the TPB, TAM, etc.) have been widely used to explore the intention to participate in shared parking. The research model was expanded in a relatively single direction, for example, residents or managers only. And to the best of our knowledge, we are the first to explore the perceived intention of this complex behavior during the implementation of a staggered shared parking policy. From the real practice of the policy, we examine the core factors that inherently affect its implementation. This paper focuses more on the influence mechanism of the implementation of the staggered shared parking policy. This policy is targeted at solving the parking demand of residential living. The parking resources are provided by the authorities, enterprises, and institutions with the conditions near the residential areas. The implementation of the staggered shared parking policy requires the joint cooperation of residents, enterprises, and the government. As the government is the policy administrator, this paper explores the influential elements of this policy, mainly around two subjects, the residents and enterprises, as well as constructing different hypothetical models for specific studies, respectively. This is helpful for advancing the shared parking to the cities. And this theoretical research that can truly guide practical applications.
This study proposed two structural models on the theoretical basis of the TPB to examine residents and enterprises influence factors in terms of accepting the staggered shared parking policy. Based on the TPB model, we incorporate the TAM model (including the latent variables PEOU and PU) to explore the mechanisms influencing residents’ use of the policy. We confirm that PBC has the strongest effect on residents making this decision, which is supported by Duy Quy Nguyen-Phuoc [
52] who highlighted that the impact of PBC derives from the perception of passengers that the service is easily accessible. Different findings include Ziboud Van Veldhoven’s [
56] study in which subjective norms are the most influential factor in the public’s willingness to use shared mobility in Belgium, followed by PBC. PU was shown to exert the most decisive influence on use intention in terms of its total effect, which is in line with previous research about the sharing economy [
28,
29,
57]. Moreover, the results of this study confirm that the PU and PEOU play a crucial role in the total impact of UI, for which this conclusion is in accordance with previous studies [
23,
29].
This study integrates perceived risks and perceived benefits (the BRA model) into the TPB research model to examine the multiple intrinsic factors on usage intentions about firms’ participation in staggered shared parking policies. The previous literature [
25,
53] has studied the provider of shared parking in terms of the resident or driver, while the role of companies has not been explored. To our best knowledge, this study is the first work to explore the different companies in studying shared parking acceptance and perceived intention, which is significant for further study. We confirmed that the company’s focus is different from that of an individual, as it needs to consider the interests and reputation of a company. And the focus of attention will vary depending on the type of parking management company. This paper concludes that ATT has the greatest influence on a company’s intention to participate in shared parking, which is supported by Yu Ning [
29] and Duy Quy Nguyen-Phuoc [
52]. Moreover, ATT is jointly influenced by numerous observed variables of PB and PR, which is supported by Yu Wang [
45] who emphasized the relative relationship between them.
5.3. Practical Implications
This paper explores the mechanisms that influence the participation of residents and businesses in staggered shared parking policies. Based on the previous research on residents’ willingness to use shared parking, this paper focuses more specifically on the group of residents who do not have a fixed parking space. Compared to high on-street parking fees, this policy can provide a good choice for users with daily nighttime parking demand that has a good price and a suitable location. In exploring the influence of user intention to use, the PBC shows the most positive impact on the UI. The findings are consistent with the Liang study [
28], which suggests that residents’ willingness to participate in a staggered shared parking policy relies not only on resources requirement and abilities but also on whether residents are eligible and conditioned to participate. Therefore, the government needs to stimulate companies which are eligible for sharing and around residential areas to actively participate in this policy. The government needs to make many efforts to deploy the supply and demand of shared parking resources.
The company’s internal parking resources are fully utilized, taking advantage of the complementary relationship between the company and the residents in terms of parking hours. The providers of staggered shared parking are businesses. By exploring the influencing factors of the provider, ATT has shown the strongest influence on UI. At the same time, ATT is jointly influenced (directly and indirectly) by the PR and PB. The providers differ from other studies [
28], but the providers all have a common concern with the safety and risk involved in the participation process. The BIS [
58] recommended establishing Disclosure and Barring Service Checks to protect providers by setting certain conditions of participation. Businesses and individuals think similarly; they also need to be provided peace of mind and more willingness to get involved. The research analysis shows that it is vital that the government should set up an incentive mechanism and a credit mechanism, which is consistent with the recommendations of Li et al. [
20], Liang et al. [
28], and Yu Ning, [
29]. Through the power of policy, it can reduce the risk undertaken by companies and provides business insurance.
5.4. Limitations and Future Research
The present study also has some limitations. The first point is that the subject of this study is specific, and the study area is in the core urban area of Beijing. It is characterized by a developed economy, inadequate parking resources, and policies that have been implemented in the area to some small extent. Survey respondents included both those who had participated and those who had not. If extended to other cities of different size classes, further in-depth studies are needed in the future. For example, Shanghai and Chengdu are already exploring shared parking policies.
The second point is that there are several types of shared parking management companies, and this paper analyzes the potential psychological factors of three types of companies. However, the differences in specific impact mechanisms were not considered in our research; their influence deserves further attention. This could be helpful in guiding the government to develop different incentive policies.
As a final point, this paper extends the psychological theoretical model of planned behavior by adding other potential variables (PB, PR, PEOU, and PU) that could better characterize the study of staggered shared parking policies and yield valuable findings. However, the effect of exogenous variables influencing perceptions on behavioral intentions was not considered in relation to the sociological characteristics of the policy. Scholars used regression analysis methods combined with the theory of planned behavior to conduct empirical and theoretical analyses of exogenous variables affecting the ATT, PBC, and SN. Thus, the impact mechanism of this policy can be further studied in the future based on this idea.