The development of an automatic method of safety monitoring at Pelican Crossings

This paper reports on the development of a method for automatic monitoring of safety at Pelican crossings. Historically, safety monitoring has typically been carried out using accident data, though given the rarity of such events it is difficult to quickly detect change in accident risk at a particular site. An alternative indicator sometimes used is traffic conflicts, though this data can be time consuming and expensive to collect. The method developed in this paper uses vehicle speeds and decelerations collected using standard in-situ loops and tubes, to determine conflicts using vehicle decelerations and to assess the possibility of automatic safety monitoring at Pelican crossings. Information on signal settings, driver crossing behaviour, pedestrian crossing behaviour and delays, and pedestrian-vehicle conflicts was collected synchronously through a combination of direct observation, video analysis, and analysis of output from tube and loop detectors. Models were developed to predict safety, i.e. pedestrian-vehicle conflicts using vehicle speeds and decelerations

Model Pemilihan Moda Antara Mobil Pribadi Dan Bis Transjogja Akibat Penerapan Biaya Kemacetan

Traffic congestion can be a serious problem in major cities around the world, especially in centrall urban area. Congestion results not only in time lost while sitting in traffic jams but also constitutes a disruption to company supply chains and the general flow of commerce. Idling vehicles contribute as well to air pollution which reduces the quality of health. The aim of this paper is to formulate mode choice model between privatepassenger cars and TransJogja Bus service as a result of the application of a congestion cost in a congested road along the region of Malioboro, Yogyakarta. The amount of the congestion cost represents the difference between perceived and actual generalized cost in traffic jam condition. In this study the congestion cost is only applied to the private passenger cars, as they are expected to shift to TransJogja Bus and, therefore, thepublic transport USAge will increas. The mode choice model was developed based on users preferences of service as indicated by travel attributes. The logit binomial model was used to formulate the individual behavior based on stated preference data from passenger car users in Malioboro, Yogyakarta. The modelpredicts the probability of choosing a particular mode of transportation. The result show that five travel attributes assumed to have high influences toward mode choice behavior. These attributes are travel cost, congestion cost, travel time, parking cost, and walking time to the bus stop of TransJogja

Pelayanan Dan Tarif Kereta Api Perkotaan Di YOGYAKARTA

High mobility of vehicles in Yogyakarta city causes a lot of traffic problems. Therefore, urban railways are needed along with urban buses to reduce congestion. This study was conducted to understand the ability to pay and the willingness to pay of urban rail users and to develop service scenarios to determine the fares. Data were obtained through interviews with the stated preference survey method, that include 4 scenarios with combination of fares, waiting time, and travel time. The results show that the first scenario is the best one. Scenario 1 indicates that 53% students who use Trans Jogja and 50.8% students who use motorcycle will switch to use the train. The probability of all Trans Jogja users and all motorcyclists to use the train is 39.9% for scenario 1 and 59% for scenario 3, respectively

Use of Systematic Approach in Accident Risk Analysis for Motorcyclists: a Conceptual Idea

Thus far, minimum stopping sight distance (SSD) is determined based on design speed, a minimum reaction time of 1.64 s and a deceleration rate of 3.4 m/s², whereas in certain situations the latter can be shorter than 1 s and higher than 4.5 m/s². Awareness of this can trigger speculative behavior, as can be seen from the choice of speed and/or the critical crossing gap, which is often smaller than the recommended minimum SSD. This study focused on the development of an appropriate minimum SSD model that is suited to risky conditions at an un-signalized intersection and its possible USAge in accident risk evaluation, particularly for motorcyclists. The data were taken from direct measurements and related studies. Variables that potentially influence minimum SSD were tested. The results strongly suggest that the speed reduction achieved by downshifting significantly influences both the braking distance and the impact speed. Moreover, the minimum SSD obtained from the proposed model significantly differs from that obtained from a similar model recommended by AASHTO. Therefore, it is worthwhile to consider the application of the proposed minimum SSD as an accident probability indicator parameter

Pengembangan Metodologi Perencanaan Transportasi Barang Regional

This paper attempts to elaborate the relationship of the economics activities of commodities toward export -specifically the production of goods and services that generate freight transportation. The spatial data of commodities related to the economics' activities (resources, factories, and outlets), the transportation data(infrastructures, modes, and services), and government regulations, are use in formulating the method for freight transportation planning utilizing intermodality concept, to produce efficient freight movements and to enhance sustainable mobility and economic development in the regional scale

Pengembangan Model Biaya Kemacetan Bagi Pengguna Mobil Pribadi Di Daerah Pusat Perkotaan YOGYAKARTA

Traffic congestion on the road occurred when travel demand exceeds the capacity of the road. This study aims to estimate and develop a model of congestion costs for private car users in the area of Jalan Malioboro, Yogyakarta, with a length of 1.414 km. The study was limited to the congestion charge for private car users only. The results show that the generalized cost of private car transportation on the actual conditions in the Malioboro area, Yogyakarta, is Rp. 5,513.77 per trip and on the conditions of free flow speed is Rp. 2,598.78 per trip, so that the congestion charge for private car users in this region is Rp. 2,914.99 per trip. The form of congestion charge model for private car users in the area of Malioboro, Yogyakarta, is an exponential function, with the lower the actual traffic speed, the greater the cost of traffic congestion caused

Development and implementation of a vehicle-pedestrian conflict analysis method: Adaptation of a vehicle-vehicle technique

This paper examines the development, use, and evaluation of a new traffic conflict analysis technique that specifically addresses pedestrian-vehicle conflicts with the intention of being applicable to shared-space environments. The method is based on an existing, well-established, and widely used vehicle-vehicle conflict analysis technique, but is adapted to consider the movement of pedestrians, which differs significantly from that of vehicles. The new method is then implemented on the Exhibition Road site of West London with the use of video data collected from locations with a potentially high concentration of vehicle-pedestrian conflicts, and the results of the analysis are presented. Finally, the results are compared with those obtained by other conflict analysis techniques and also against accident data to assess not only the accuracy but also the functionality of the new technique

Analysis of pedestrian-vehicle traffic conflicts in street designs with elements of shared space

This paper investigates changes in pedestrian-vehicle traffic conflicts in urban streets redesigned according to the principles of shared space, using a recently developed Pedestrian-Vehicle Conflicts Analysis (PVCA) method. In a first step, the PVCA method is revised to more accurately reflect the features of shared space: this includes the definition of a systematic process for identifying conflict occurrences on one hand, and the full quantification of the conflict severity grading process on the other. Then, the refined PVCA method is applied to a case study in London, using video data from periods before and after the redevelopment of the Exhibition Road site from a conventional dual carriageway to a modern design with some elements of shared space. The results of the comparative analysis carried out indicate a general decrease in traffic conflict rates as a result of the redesign, but also highlight specific issues that may require additional analysis