Commuting Trips, Income and Gender in the Metropolitan Maputo, Mozambique

The deterioration of public transport services coupled with rapid urbanization and the increased use of private transport imposes an increasing burden on the commuters in the metropolitan area of Maputo. Using household surveys conducted in Maputo, this paper seeks to investigate the commuting trips and gender relations by employing binomial logistic regression. The empirical results revealed the household income as the main attribute affecting the likelihood of using bus transportation. The results also indicated that women are less likely to use buses in their daily commute. The main implication of these findings is that commuters from the low-income households particularly women will have their motorized mobility reduced unless proper policies are designed catering to their mobility needs.


Introduction
Urban mobility plays a crucial role in the residents' and workers' quality of life as well as the facilitation of economic development of a country. In this paper we use the term "mobility" to refer to the physical use of a specific mode of transport that an individual needs to cover a geographic distance from point A to point B (Goncalves et al., 2017). When analyzing urban mobility, there are three main stakeholders that need to be considered, namely: the users of urban transport systems, transportation service providers, and public municipal authorities (PMAs) (Suguiy, Carvalho, & Ferreira, 2020). However, in this paper, we focus specifically on the users of urban infrastructures, looking at how gender and income influence their mobility and their perceptions about the transportation How to cite this paper: Tembe, A., & Matusse, A. (2020). Commuting Trips, Income and Gender in the Metropolitan Ma-service providers and the PMAs, with special geographic focus in the Greater Maputo Metropolitan Area, in Mozambique, southern Africa.
Maputo is the capital and the most urbanized region in Mozambique with more than 3 million inhabitants. Because of its political, economic and financial status, Maputo attracts a large number of people from the other provinces and emigrants from neighboring countries. In turn, the processes above-mentioned add pressure to the already deficient public transportation in the city. Like in most cities in the developing countries, daily commuting is increasingly becoming difficult specifically to the low-income residents partly due to the rapid suburban sprawl and increased use of private transport, and deterioration of public transport services. In Mozambique, few studies have focused on mobility. From those studies some focused on the drivers and safety (Couto et al., 2009;Couto & Lawoko, 2011); other studies have focused on the demand for bus services (Tembe et al., 2017); other studies have focused on mapping the rapid paratransit systems and their operations (Colaço & Serra, 1998;Leão, 2012;Klopp & Cavoli, 2019); and other studies have focused on urban transport policy choices and coordination between public and private entities (Araújo, 2014;Mendonça, 2014;Seco, Bastos-Silva, & Matos, 2017;Mabucanhane, 2018); other studies have focused on alternatives to mobility among commuters (Federhen, 2018) and some studies focused on the interplay between spatial planning and urban transportation (Jorge & Melo, 2014). However, while those studies have offered valuable insights into the dynamics of public transportation in Maputo, they don't address the interplay between mobility, gender and income, specifically in contexts like Maputo. This limitation is noticed in the mainstream literature on public transport. For example, Tara (2011) states that "gender has not been fully integrated into the mainstream of either the infrastructure debate or the debate on transport services". Scheiner and Holz-Rau (2012), argue that "gender has played an important role since about 1980, when the issue of 'women and transport' entered the field. There is now substantial evidence for gender differences in travel behavior". However, "relatively little is known about the reasons and mechanisms such differences are based on".
Understanding the interplay of these three factors is important because most women in Maputo do not own private vehicles, and according to JICA (2012), they make fewer trips (1.5 trips) than men (1.9 trips). In addition, like other Sub-Saharan African cities Maputo faces gender-based socio-economic inequalities being the women the most vulnerable group. The authors believe that a better understanding of the interplay of the three variables can contribute to diminish the socio-economic inequalities through better mobility strategies that facilitate women's participation in the urban activities (e.g. employment, school, health centers). PMAs need to consider the commuters' travel behavior and needs in their decision-making process to facilitate the commuters' mobility, ensure well-being and social inclusion in Maputo. Next, we review the foundations upon which the urban transportation system is built to better understand In the metropolitan area of Maputo, the modal share of urban transport is currently dominated by walking (45.8%), followed by paratransit chapas (32.9%), private cars (10.2%), buses (9.2%), train (0.6%) and others (1.3%). Comfort, travel time and convenience are commonly known to influence decisions about choosing a mode of transport. Compared to the train, the frequency of paratransit and buses is considered low. Overall, the crew members of the chapas are not the owners but are hired workers who must pay the agreed daily fees to the vehicle owners while ensuring the maintenance of the vehicles. In order to maximize benefits, the paratransit crew try to make as many trips as possible by boarding more passengers into the crowded vehicle while reducing the maintenance expenses. It should be noted that more than 50% of paratransit drivers do not have a driving license for the public transport service, which might contribute to the reported lack of cordiality towards passengers. The number of railway users is insignificant, and the train only makes two daily commuting trips during the morning and the evening peak hour periods.
Furthermore, public transportation users were asked about their perceptions of the service provided, namely public transport frequency, vehicle condition, crew behavior, and the fare. The results from the respondents are displayed in   The paper is organized as follows. In Section 2, previous studies are reviewed.
Section 3 discusses data collection procedures and methods. Section 4 is devoted to model estimation and discussion of results. Finally, the conclusion is presented in Section 5.

Literature Review
The factors influencing the use of transportation have been one of the main concerns in the literature on mobility. According to the transport mode choice theory, mode choice is influenced by the characteristics of the decision maker or individual, the number and attributes of alternatives, and their decision rule.
Under Travel Choice Theories a decision maker is assumed to rank possible alternatives in order of his or her preference and to choose the option from the available alternatives which he or she considers the most desirable considering his or her preferences and the relevant constraints placed on decision-making (Oum, 1979;Gillen, 1977;Asensio, 2002;Müller, Tscharakstschiew, & Hasse, 2008;Buehler, 2011).  (2013) identified accessibility as the main concern for the use of buses and paratransit. For example, it has been found that a substantial part of urban dwellers does not have daily access to public transport services, because they are expensive and not easily accessible.
A research by Srinivasan and Rogers (2005) examined the travel behavior of low-income groups in India and found that travel behavior measures such as choice of mode, travel time, cost and frequency are affected by location. According to Cheng et al. (2013), low-income families in China have lower levels of mobility than other income groups. Low-income families not only make fewer trips, but also shorter trips. Regarding the mode of transport, hiking, motorcycles and bicycles were identified as the main non-motorized transport, while for motorized trips the bus is the most dominant mode. A further analysis by Barter (1999), reveals that the mobility of poor people is extremely limited mainly because many cannot afford any form of private motorized transport or public transport, although in some Asian cities low-income households have motorcycles. Despite making shorter and shorter trips, the urban poor take longer travel time than people from higher-income families. Since Rosenbloom (1978) articulated the need for a study of women's travel issues some studies have sought to pay special attention to gender and mobility from a variety of disciplinary fields. A mode choice investigation in Germany by Scheiner and Holz-Rau (2012) with focuses on car use in car deficient households in Germany and concluded that "deeply rooted gender norms are at play" in car use in such households feminist and economic studies have shown that low income and restricted access to labor market influence women's mobility (Blumen, 1994;McDonald, 1999). Other studies, specifically in sociology, have shown the link between social roles of women and mobility (Hanson & Johnston, 1985;Wen & Koppelman, 2000). Social psychological studies have focused on how attitudes and norms based on preference shape women's travel behavior (Hakim, 2000). Anthropological and feminist studies also highlighted the patriarchal power relations that might impact women's mobility (Hartman, 1979;Walby, 1990). Finally, some studies have focused on gender and race and their impacts on women's mobility (Hu, 2020).

Data Collection and Methods
In this paper, data collection was carried from December 9-24, 2019 in the metropolitan area of Maputo namely Maputo City, Matola, Boane and Marracuene.
Ten surveyors were selected from the main universities in Maputo. The surveyors were selected on the basis of their academic records and were invited to join a workshop program on how the questionnaires should be filled as well as ethical issues related to data collection. The sample size was determined based on the proposal from (Israel, 1992) and the number of daily commuters in the metropolitan area. Israel (1992) proposes that to determine an appropriate sample size the following criteria must be considered: "the purpose of the study, the level of precision, the level of confidence or risk and the degree of variability in the attributes being measured". In terms of the level of confidence or risk Israel (1992) suggests that for a size of population greater than 100,000 the equivalent sample size should be of 400 for a 95% confidence level. Consequently, considering the fact that according to (JICA, 2012) Maputo records more than 1.5 million travelers in a daily basis, and to compensate for risks resulting from bad questionnaire filling and the refusal to answer, the sample size was increased from 400, as suggested by 38 to 800 observations. Of the 800 questionnaires dis- In this research the authors used the binomial logistic regression because they believe that in developing cities like Maputo the majority of the population has no choice in terms of transport alternatives. In Maputo the majority of the population using public transport tends to take the mode of transport that first arrives at the public transport terminals or bus stops. This observation is at odds with previous studies on transportation.
The sample of the data collected in Maputo is described in

Model Estimation and Discussion
The literature advocates some associations between transportation alternatives and the attributes of individuals. A binomial logistic regression equation was estimated with the variables selected in accordance with the literature review. Only individuals commuting by paratransit and public buses were considered in the analysis. Table 2 shows the variables that are included in the binomial logistic regression.
The following assumptions are made: • The dependent variable is the transport mode-buses and paratransit chapas.
• Explanatory variables are individual attributes-gender, income, and work status. Table 3 shows the likelihood of selecting a bus over paratransit in Maputo. In general, statistical indicators show that the model is relatively appropriate and a good fit with the Pseudo R-square at 69%, while the p-value (the exact level of significance level) is almost zero. As stated by Gujarati (2011), the Pseudo R-square value is not a measure of the proportion of the variance in the regressand explained by the regressors included in the model. Therefore, the Pseudo Table 2. Variables in the model  0.696. "***" 0.001 "**" 0.01 "*" 0.05 "." 0.1 "1". As it is shown in Table 3, two variables are the most relevant when choosing buses in Maputo, namely, income; and gender. A negative coefficient implies reduced odds of an alternative over the other, whereas a positive coefficient implies the opposite. From Table 3 it can be noted that individual income increases the likelihood of using buses over chapas, holding other variables constant. This positive relationship between the choice of buses and income is consistent with travel demand (Ben-Akiva & Lerman, 1985). The negative relationships between the choice of buses and gender indicate that women are less likely to use buses in their daily commute. Surprisingly, Salon and Gulyan (2019), also reported that women are less likely to use motorized modes in the large and small Kenyan cities. In a comparative analysis of the travel behavior between Maputo and Nairobi by (Tembe et al., 2020) it was reported that gender had no impact on the likelihood of selecting Non-Motorized Transportation (NMT) either in Maputo or Nairobi. This indicated that men and women are equally likely to walk.
Another study by Tembe et al. (2019), revealed that gender (female) had no effect on the probability of choosing buses over paratransit in both cities.
In a research conducted by Tembe et al. (2019), Sub-Saharan African cities were described to have a relatively denser bus network in central areas and therefore also a higher service frequency compared to suburban zones. Because of this, paratransit are more likely to attract more users than buses in the city area.
Considering the results above, the authors conclude that with the continued rapid urbanization it is expected that a significant proportion of residents will continue to make their daily trips by foot. This means that their mobility (especially women's), will be reduced and consequently the difficulties in accessing, for example one's workplace or basic public services, will result in a lower quality of life. Additionally, given the perception of poor quality of the public transport service, the authors envisage a modal shift from collective transportation to private transport, creating a vicious cycle with negative implications for society and the environment. This modal shift from collective to private transportation is also evidenced by the literature on travel demand. According to Ortúzar and Willumsen (2011), economic growth provides the first impetuous to increase car ownership and use while reducing public transport use. The literature suggests that with the reduced number of public transportation users, transportation operators might respond by increasing fares, reducing service frequency or both.
Meanwhile these measures make car usage more attractive than before and induce more people to buy cars, thus accelerating the vicious cycle.

Conclusion
This research examined the interplay between mobility, gender and income in the Maputo Metropolitan Area, Mozambique. The survey was carried out from December 9-24, 2020 in the metropolitan area of Maputo, specifically, in Matola, Boane and Marracuene. A 4-page questionnaire with two sections was prepared and a binomial logistic regression was applied. The first part of the form comprised questions related to the socioeconomic attributes of households and individuals. The second part of the questionnaire consisted of the travel behavior of the respondents.
The empirical results revealed the household income as the main attribute affecting the likelihood of using bus transportation in Maputo. The findings also indicated that women are less likely to use buses in their daily commuting. These results show that transportation behavior is strongly influenced by income and gender variables with women and men being unequally affected.
In view of these findings, the authors conclude that with the continued rapid suburban sprawl it is expected that a significant proportion of low-income commuters, especially women, will continue to make their daily trips on foot. Although walking is good for the environment and health purposes in sprawling developing cities like Maputo it constrains commuters' opportunities to participate in urban activities resulting in a low quality of life. What this implies is that transportation planners should consider income and gender while planning, designing and implementing transportation policies. Moreover, given the perception of poor quality of the public transport service, the authors envisage a modal shift from the collective to private transportation, creating a vicious cycle with negative implications for the society and the environment.