Tri Basuki Joewono

SAFETY AND SECURITY IMPROVEMENT IN PUBLIC TRANSPORTATION BASED ON PUBLIC PERCEPTION IN DEVELOPING COUNTRIES

Public transportation poses a higher risk of safety and security since there happen to be more passengers in one car. The problem becomes worse in developing countries, because of the lack of suitable and integrated approaches. The aim of this research is to explore the perception of safety and security problems on the part of those parties involved in the operation of public transportation. This perception is used as a base to develop an improvement agenda for the particular context of developing countries. The research employs a questionnaire survey to collect the perception data. This paper explains the perception of users and drivers of paratransit as well as that of non-users and civil servants, concerning safety and security of paratransit in the city of Bandung, Indonesia. The rank of importance for each factor is analyzed by applying the factor analysis. Analysis shows that the user is the most important party involved. The understanding and awareness of the user (including the driver) is the most important variable to improve the condition. Three aspects of an improvement agenda are proposed based on the perception data, namely technology, management, and institution. This agenda is clarified by a set of action plans incorporating the responsible parties and a time frame. The action plan is divided into three terms to define a clear goal for each step. The short-term action focuses on the hardware and on preparing further steps, whereas the medium-term action focuses on developing and improving the standard of safety and security. The long-term action focuses on advancing safety and security practices. The effectiveness of this agenda and action plan rests upon a set of assumptions, such as the degree of seriousness from the authoritative institution, fair distribution of information, the availability of reasonable resources, and coordinated and collaborative action from all parties involved to reach the objective.

Paratransit Service in Indonesia: User Satisfaction and Future Choice

Abstract This paper explores user satisfaction with making use of paratransit in Bandung, Indonesia. User perceptions of attributes are analyzed using factor analysis to find representing attribute types and factors of service quality. Ordinal probit analysis is employed to explore the characteristics of users regarding their perception of satisfaction with the paratransit service. Binary logistic analysis is undertaken to predict users’ choice probability in making use of paratransit in the future when there is a service improvement. The study reveals that what may be of importance in developed countries carries a different weight of importance for paratransit users. This fact can be explained by describing the characteristics of users that expressed their satisfaction, which also explains the target market for this mode. The analysis reveals the notion that financial motives seem to dominate when users select to use paratransit.

Behavioural Causes and Categories of Traffic Violations by Motorcyclists in Indonesian Urban Roads

To prevent road accidents and formulate policies to promote road safety in urban roads, it is crucial to understand factors that cause violation of traffic rules. Although such issues have been investigated in developed countries, the availability of such knowledge in rapidly motorizing countries, such as Indonesia, is still poor. This study aims to investigate the factors influencing violation behavior by motorcyclists and types of such violations. The study is based on surveys of three metropolitan cities, namely Bandung, Yogyakarta, and Surabaya, in Indonesia. Structural equation modelling has been performed to investigate factors influencing motorcyclists to commit traffic violations and their causal relationships. Although there are differences in the ranking of factors influencing traffic violations among the three cities studied, the analysis has been able to show patterns of similarities as well. The inadequacy of engineering and maintenance conditions of the road infrastructure appears to be partly responsible for the phenomenon of motorcyclists developing a lack of respect to traffic rules.

Exploring Public Perception of Paratransit Service Using Binomial Logistic Regression

Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content. A number of uniaxial compression tests have been conducted onto soft rock samples. The results showed that the strength reduced significantly in saturation. The reduction was also caused by weathering, the strength of distinctly weathered rocks were lower than that of partially weathered rocks. In conjunction with the uniaxial compression test, point load strength index tests, IS(50), have also been conducted in order to obtain a correlation between the UCS and the point load strength index IS(50). The results showed that the IS(50) could well be correlated with the UCS. A conversion factor of 14 is proposed for soft rock materials.Cold Asphalt Emulsion Mixture (CAEM) is a mixture of aggregates and asphalt emulsion that is mixed at room temperature. It is relatively simple to produce, but the design procedure provided by the Asphalt Institute and the Ministry of Public Work of Indonesia pose some problems in its practical application. This Technical Note discusses limitations of the current design procedures and presents a simpler and more practicable design procedureKnowledge of the market is a requirement for a successful provision of public transportation. This study aims to explore public perception of paratransit service, as represented by the user and non-user of paratransit. The analysis has been conducted based on the public’s response, by creating several binomial logistic regression models using the public perception of the quality of service, quality of car, quality of driver, and fare. These models illustrate the characteristics and important variables to establish whether the public will use more paratransit in the future once improvements will have been made. Moreover, several models are developed to explore public perception in order to find out whether they agree to the replacement of paratransit with other types of transportation modes. All models are well fitting. These models are able to explain the respondents’ characteristics and to reveal their actual perception of the operation of paratransit. This study provides a useful tool to know the market in greater depth.In recent years, meshless methods have gained their popularity, mainly due to the fact that absolutely no elements are required to discretize the problem domain. This is possible due to the nature of the approximation functions used in this method. Approximation functions used to form the shape functions use only the so-called “nodal selection” procedure without the need of elements definition. The most popular approximation function used is the moving least-squares shape functions. Published works in meshless methods, however, present only the basic formulas of the moving least-squares shape functions. This paper presents the complete and detailed derivations of not only the moving least-squares shape functions, but also their derivatives (up to the second order derivatives), using the exponential weight function. The derivations are then programmed and verified.

Exploring the willingness and ability to pay for paratransit in Bandung, Indonesia

This article explores the willingness and ability to pay of the paratransit user. Paratransit (jitney) in this study refers to a public mode of transport of passengers that is owned and operated by private individuals or very small enterprises. The data was collected from a survey in Bandung, Indonesia, and analyzed using ordinal probit and binomial logistic regression. The findings illustrate a gap between the values of willingness and ability, and also reveal that people have different valuations regarding their related perceptions. The analysis explains the groups of users who have a tendency to assign a higher value, including the characteristics of users who agree with higher fare increments. This study also discusses the policy implications of this analysis.

PENELITIAN PENDAHULUAN HUBUNGAN PENAMBAHAN SERAT POLYMERIC TERHADAP KARAKTERISTIK BETON NORMAL

The essence of building design process and management for building sustainability in the creation and maintenance of a qualitative architectural product is investigated in this paper. The design process, concept of building sustainability and particularly the quality of the built environment are discussed. Akure, a state capital in Nigeria was used as a case study. The principles and indicators for sustainability of buildings and its implications on the quality of the environment are examined in details. Survey findings include the views of the professionals on the clients, perception on the design process as well as management of projects, and the implications on the quality of the ensuring products and the city’s environment. The data were factor analyzed using varimax rotation criterion (with Kaiser Normalization). The results revealed that five factors were effective, with one of them exhibiting the greatest variability and individual differences. The variables that loaded on this factor were really the aspects of the process and management relating to the clients. The findings also revealed the professionals’ wrong attitude towards design process as shown with a very high degree of variability in the study. The paper concludes by recommending the enactment and enforcement of relevant policies with adequate education of the people and the involvement of all the stakeholders in the management of building projects and environmental programmes for the realization of a qualitative architectural product.

The causal relationship of the service quality of the TransJakarta Busway

The implementation of the TransJakarta Busway in 2004 is viewed as one of the solutions to provide higher-quality public transportation service to solve the transportation problem in Jakarta. An improvement in service quality requires research that rigorously explores the experiences and perceptions of users of this mode of transportation. This article aims to provide an explanation regarding the causal relationship of the service quality of the TransJakarta Busway. The analysis employs two data sets that were collected from questionnaires: a data set pertaining to the first corridor and a data set pertaining to all of the corridors (seven corridors). Structural equation modelling is employed to show and test the causal relationship of the constructs of loyalty and service quality based on image and fact. The study shows differences in the factor loading between the two models; therefore, an analysis of the service quality of the busway system necessitates an evaluation of each aspect from all of the corridors to obtain a representative result rather than relying on information pertaining to only the oldest single corridor. The results of the causal relationship analysis suggest that the operator should devote attention to each attribute of service quality and the unique situation of each corridor. Based on the images and experiences of the users, the operator should provide a standard level of quality to all corridors to reduce the gap between image and fact.

Traffic violations by young motorcyclists on Indonesian urban roads

ABSTRACT It is already understood that road users have differences in capability and limitations in driving their cars and motorcycles. Most studies regarding variability and safety concerns related to road users’ driving behaviors, however, are based on data from developed countries. It is argued that there are differences in characteristics and consequences of road accidents in developed and developing cities due to the impacts of the different composition of traffic, road users’ attitudes and driving behaviors, vehicle type and size, regulations, and types of violations. This study aims to investigate the factors underlying traffic violation behaviors and the types of traffic violations committed by young motorcyclists on urban roads in Indonesia. Data were gathered using a questionnaire survey in three major cities. Structural equation modelling was performed to analyze the significant factors influencing young motorcyclists with regard to committing traffic violations, including analysis of the causal relationship between the influencing factors, the characteristics of young motorcyclists, and the types of violations. The analyses found that young motorcyclists were influenced by different magnitudes of influencing factors in violating traffic regulations compared to more mature motorcyclists. This highlights the need to design a specialized behavioral change policy to reduce traffic violations among young motorcyclists.

PENGARUH PENGGUNAAN SPEED HUMPS TERHADAP TINGKAT KEBISINGAN

Speed humps are speed limiting devices to protect pedestrians and reduce the accident rate. The installation of speed humps in residential can reduce the speed of motorists but, at the same time, also can create a problem. The purpose of this study is to analyze the noise level caused by installation of speed humps and to compare noise levels before and after vehicle crossed the speed humps. The results show that the noise levels caused by vehicles after passing the speed hump are higher that those before the hump. The average noise levels at distances of 50 m and 10 m before the speed hump are 64.15 dBA and 63.63 dBA, respectively. These values increase to 66.64 dBA and 69.89 dBA at distances of 50 m and 10 m after the speed hump. It is also found that the noise levels for different location and time of measurement are significantly different. Keywords: speed humps, noise level, speed limiting device.