This paper explores the impact of Gedebage Terminal development to traffic performance in Bandung City, as well as the development of the inner-city toll road that connects eastern and western part of Bandung City. In addition, the study also analyzes the potential of minibus / public transport route that connects three terminals, namely Gedebage, Cicaheum and Leuwipanjang Terminal, in Bandung City. The study is carried out by using the 4-step modeling principle, by utilizing EMME/4 software. According to the analysis, the development of inner-city toll road will impact the city’s road performance significantly. On the other hand, the development of Gedebage Terminal as a terminal that serves intercity travel replacing Cicaheum Terminal will influence road network performance around the terminal in terms of traffic flow, vehicle speed and volume capacity ratio. The analysis results also suggest that the addition of public transport fleet with high capacity, such as bus, that connects the bus terminals is necessary to support public transport performance in Bandung City.
One of the pavement types often used in Indonesia is flexible pavement. Many methods and programs can be used for flexible pavement structure analysis, such as analytical method using Kenlayer program. Variation of load type (single axle, dual-tandem, and dual-tridem) and material characteristics (linear-elastic, and nonlinear-elastic) used to approach the real condition in the field. In addition, repetition load during service life to failure criteria of flexible pavement structure with several variations of its design attributes need to be considered to gain more understanding for its pattern and relationship. This research aims to analyse the relationship for variation of load type, material characteristics to its response; and failure criteria in service life analysis with some attribute variant which can be used to optimize each attribute in future. Based on the results from Kenlayer program for variation of load type, the biggest response of deflection is resulted from dual-tridem followed by dual-tandem while load type variant has insignificant response to stress and strain. The variation of material characteristics indicates that for 3layer pavement system: linear-linear-linear material (L-L-L) has higher value of flexible pavement responses compared to linear-nonlinear-nonlinear material (L-NL-NL) hence the nonlinear material is recommended for 2 nd and 3 rd layer. In case of service life analysis, failure criteria mostly resulted from permanent deformation for variation of loads, and resilient modulus of each layer, nevertheless the different result is observed in thick layer of surface and base course where fatigue cracking is more dominant and the optimal condition is when fatigue cracking graph intersect with permanent deformation. AbstrakSalah satu jenis struktur perkerasan yang paling banyak digunakan di Indonesia adalah struktur perkerasan lentur. Terdapat banyak metode dan program dapat digunakan untuk analisa struktur perkerasan lentur, salah satunya adalah Metode Analitis dengan menggunakan program Kenlayer. Variasi tipe pembebanan (single-axle, dualtandem, dan dual-tridem) serta karakteristik material (linear-elastik, dan nonlinear-elastik) digunakan sebagai pendekatan pada kondisi lapangan. Beban repetisi selama umur layan terhadap kriteria keruntuhan dengan beberapa variasi pada atribut desain struktur perkerasan lentur perlu dianalisis untuk mendapatkan pemahaman yang lebih dalam serta mendapatkan pola perilaku dan hubungannya. Penelitian ini bertujuan untuk menganalisis hubungan pada berbagai variasi beban, karakteristik material terhadap respon struktur, serta kriteria keruntuhan pada analisis umur layan dengan beberapa variasi atribut yang digunakan. Berdasarkan hasil yang didapatkan dar program Kenlayer, untuk variasi beban didapatkan titik respon maksimum adalah berada pada (0; 17,15) pada single-axle dan dual-tandem, serta (121,9; 17,15) pada dual-tridem. Defleksi terbesar terjadi pada beban dualtridem diikuti dengan dual-tandem, dimana variasi dari beban tersebut tidak berpengaru...
Pavement distress can interfere with the vehicle’s maneuver, causing the vehicle to reduce its speed and change lane or do an evasive maneuver to avoid it. These behaviors could impact traffic conflict significantly. This study aims to identify the impact of pavement distress on vehicle maneuver, specifically the speed and evasive maneuver of the vehicle when approaching poor pavement conditions. The results show differences in responding to pavement distress for each type of vehicle. Motorcycles tend to maneuver or change lanes to avoid the poor pavement condition and it may be because of its dimension, while heavy vehicles tend to reduce the speed while confronting the pavement distress. Besides, light vehicles tend to maneuver, reduce their speed, and do a combination of those responses. From this study, we can investigate that it could be dangerous if the vehicle takes an opposite lane while there is a vehicle on the opposite lane. Some vehicles reduce their speed while confronting poor pavement thus they could be more careful on roads, nevertheless, in the rainy season, it could be dangerous, especially when the pothole is covered with rainwater. The improvement of road conditions is vital to enhance travel time and reduce obstacles on road.
Premature damage to pavements in Indonesia before its service life ends is partly due to climate variations and traffic loads. This study's main objective is to compare Dynamic Modulus (| E*|) and the Resilient Modulus of the Pen 60/70 AC-WC mixture using the SBS polymer modified asphalt. The performance from Marshall test shows that the highest Marshall Stability value (1007 kg) for AC-WC, and the Marshall immersion test gives the highest value of 98.13% for the same AC-WC mixture with 3% SBS. At low temperature (4°C), AC-WC with 0% SBS mixture has the highest Dynamic Modulus value (1792.7 MPa). While at high temperature (45°C), AC-WC with 3%, SBS has the highest Dynamic Modulus value (61.8 MPa). The test results show that the SBS modified asphalt mixture gives better performance at high temperatures. Overall, the AC-WC with 3% SBS mixture is better than the other mixtures. Thus, the use of SBS polymer asphalt can be a solution to improve the performance of the mixture. The dynamic modulus with AMPT test and Witczak equation showed a high correlation (0.9844). Additionally, the correlation for resilient and dynamic modulus also has higher correlation with R 2 = 0.9818.
Pengembangan infrastruktur berkelanjutan dapat didukung dengan memperhatikan keseimbangan antara pemenuhan kebutuhan pada masa sekarang dan masa yang akan datang. Dua aspeknya meliputi aspek lingkungan dan sumber daya. EAF Slag Aggregate merupakan limbah alternatif pengganti agregat yang mendukung aspek sumber daya. Sedangkan Zeolit Aspha-Min adalah aditif Warm Mix yang mendukung mengurangi emisi gas CO 2 dan gas rumah kaca dalam aspek lingkungan. Penelitian ini melihat kinerja campuran beraspal hangat AC-BC dengan penggantian 30% EAF Slag Aggregate terhadap agregat alam. Sedangkan kadar zeolit Aspha-Min berdasarkan penelitian terdahulu dicampurkan pada kadar 0,3% dan 0,5% terhadap berat campuran. Suhu pencampuran dan suhu pemadatan Warm-Mix didapatkan dengan trial and error 10 0 C-20 0 C dibawah suhu viskositas aspal. Campuran beraspal AC-BC kadar 0,3% Aspha-Min dapat menurunkan suhu pencampuran dan pemadatan sebesar 20 0 C. Campuran ini lebih tahan terhadap fatigue namun memiliki nilai modulus resilien yang paling rendah dari campuran lainnya. Sedangkan campuran beraspal AC-BC kadar 0,5% Aspha-Min dapat menurunkan suhu pencampuran dan pemadatan 10 0 C. Campuran ini cenderung lebih kaku karena memiliki nilai modulus resilien yang paling tinggi dan memiliki nilai siklus Nf yang rendah sehingga rentan terhadap fatigue dibandingkan campuran lainnya. Campuran optimum didapatkan dari proporsi campuran EAF Slag 30% dengan penambahan aditif Aspha-Min 0,3% dalam hal penurunan suhu pemadatan, pencampuran dan ketahanan terhadap fatigue.
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