Lately, plastic waste has become a problem in our society, due to the negative impact that it has on our environment. To mitigate this, the reuse of plastic bottle wastes and other local materials should be encouraged. In this paper, the authors present an innovative application for polyethylene terephthalate (PET) that is obtained from plastic bottle wastes, as an additive to Asphalt Concrete-Wearing Course (AC-WC), a hot mix asphalt (HMA) type. The AC-WC sample that contained the PET was measured using the wet method to determine the Marshall parameters of the samples. The type of bitumen used as the specimen is asphalt, which has a penetration value of 60/70. The optimum asphalt content (OAC) obtained from the preliminary study was found to be 5.7% of the total asphalt weight. The results show that AC-WC mixture strength improves when plastic bottle waste is used, which can be correlated with an increase in stability. This finding shows that plastic bottle waste and other local materials have an alternate use as a road pavement material.

Mulyosari roundabout becomes the liaison of residential area, education and shopping center in Mulyosari and surrounding areas. The construction of new activity centers in the region brings consequences to the increased volume of vehicles in the Mulyosari Roundabout. In this paper will be presented evaluation results on the performance of Mulyosari roundabout. The data used include geometric data, traffic flow, environmental conditions, location map, population number, and growth of motor vehicles. Further analyzed in accordance with existing methods in MKJI 1997 with the help of KAJI program to calculate the volume on the existing condition. Results obtained in 2017 obtained DS> 0.75 on one part of the roundabout, so that the performance changes to be a signal intersection. With the improvement to 3 phases, obtained DS> 0.75 on all approaches and Level of Service (LOS) intersection is C. While in the projection of 2019-2021 obtained LOS D, then in 2022 obtained LOS E.

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ABSTRAKKebijakan sistem transportasi berkelanjutan ini memiliki tiga syarat utama, yaitu peningkatan kesejahteraan rakyat, meminimalisasi dampak lingkungan hidup dan adanya keberlanjutan penggunaan potensi sumber daya. Sumber polusi udara di daerah perkotaan termasuk di Kota Surabaya biasanya datang dari sektor transportasi karena sebagian besar kendaraan bermotor menggunakan bahan bakar minyak (BBM). Bahan bakar gas (BBG) merupakan salah satu bahan bakar alternatif yang dapat digunakan dalam rangka perbaikan kualitas udara di Kota Surabaya. Dalam konteks ini kiranya penting diketahui bagaimana implementasi pemakaian BBG di Kota Surabaya. Pendekatan dalam kajian ini dilakukan dengan melakukan survey terhadap pihak pengelola kendaraan umum dan pihak pemakai kendaraan dinas di lingkungan Pemkot Surabaya yang pernah menggunakan BBG. Selanjutnya, dilakukan evaluasi terhadap pengalaman pemakaian BBG oleh taksi zebra dan kendaraan dinas dilingkungan Pemkot Surabaya. Hasil yang didapatkan memperlihatkan bahwa keunggulan dari pemakaian BBG untuk angkutan umum (taksi) dan kendaraan dinas yang beroperasi di wilayah Kota Surabaya, diantaranya : harga BBG lebih murah dibandingkan dengan BBM; volume pemakaian BBG lebih irit dibandingkan dengan BBM; dan lebih ramah lingkungan. Sedangkan kelemahannya diantaranya : jumlah SPBG masih sangat sedikit; stock BBG yang tersedia di SPBG terbatas; pasokan BBG pada stasiun yang ada belum lancar; dan lokasi SPBG masih sulit dijangkau. Ditinjau dari sistem operasionalnya, implementasi pemakaian BBG pada kendaraan umum berbeda dengan kendaraan dinas.

This paper deals with the innovation of road construction materials by the use of polyethylene terephthalate (PET) as asphalt mixtures. The PET was obtained from plastic bottles waste. The purpose of this research is to investigate the effects of the PET on Marshall parameters on asphalt concrete pavement. The wet method is used in this research. It means that PET plastic material is directly mixed into asphalt when the asphalt is heated, then aggregates are added. In this research, asphalt with penetration of 60/70 is used. Its optimum asphalt content (OAC) is 5.7 percent while The percentages of the added PET are 3 percent, 4 percent, 5 percent, 6 percent, and 7 percent of the asphalt by weight. The results show that the addition of PET plastic waste into the mixture has a significant positive effect on the Marshall parameters of asphalt concrete pavement. The addition of PET waste has been able to increase the value of other Marshall parameters, including Voids in Mix (VIM), Voids in Mineral Aggregates (VMA), Voids Filled with Asphalt (VFA), Flow, and Marshall Quotient (MQ). This research result will contribute to a significant outcome in emerging a sustainable material for road infrastructure.