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"Freight transport plays a very important role in economic activities. However, in some cases, the local transportation authority often disregards its existence, including in parking management issues. This research is aimed at developing an optimization model for off-street parking space management that considers freight cars and passenger cars as two different entities. Optimization aims at minimizing the joint function of the parking index of freight cars and the parking index of passenger cars. Weighting is given to both parking indexes to represent the interest level of parking operator to both types of vehicles. Parking space of both vehicles is at any time is arranged in a dynamic manner based on the inflow and outflow rate of vehicles at previous times. The parking index is limited by the maximum parking index desired by the management. The proposed model is applied to the parking activity in Jatinegara Trade Center (JTC), Jakarta, and shows that the model solution provides a better parking index than the actual parking index (without optimization)."

"Kendaraan berat (HV) memiliki sifat yang berbeda dibandingkan dengan mobil penumpang biasa. Sifat ini termasuk kinerja HV sendiri, seperti kemampuan HV untuk mempercepat, mengurangi kecepatan dan mempertahankan kecepatan konstan. Sifat lain yang berbeda untuk HV adalah dimensi mereka. Lebar HV bijaksana dan panjang bijaksana jauh lebih besar dari mobil penumpang normal. HV yang membawa barang juga memiliki kecenderungan untuk membawa lebih banyak muatan daripada yang mampu mereka lakukan, yang mengakibatkan situasi kelebihan muatan. Faktor Ekivalensi Mobil Penumpang (EMP) membantu menentukan pengaruh HV terhadap kapasitas jalan. Faktor ini mengubah HV menjadi unit yang disatukan, yang merupakan unit mobil penumpang (UMP). Ada berbagai cara untuk menentukan nilai EMP, dalam penelitian ini, metode lagging headway digunakan. Upaya ini juga membahas efek gradien terhadap kecepatan HV yang kelebihan beban dan dengan demikian berkorelasi dengan nilai EMP. Metode lagging headway menggunakan rata-rata lagging headway dari HV dan mobil penumpang untuk memperkirakan nilai EMP. Metode ini mempertimbangkan panjang kendaraan, yang mewakili jumlah ruang yang ditempati oleh HV. Metode lain yang serupa juga digunakan sebagai perbandingan dengan metode primer, yang merupakan metode leading headway. Metode ini mirip dengan metode lagging headway, tetapi sebaliknya menggunakan leading headway yang dipertahankan oleh HV untuk menghitung nilai EMP.

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Heavy vehicles (HV) have different properties compared to passenger cars. These properties include the performance of HV themselves, such a HV ability to accelerate, decelerate and maintain a constant speed. Another property that is different for HV is their dimensions. HV width wise and length wise are far larger than normal passenger cars. HV that carry goods also have a tendency to carry more load than they are able to, resulting in an overloaded situation. Passenger Car Equivalent (PCE) factor helps determine the effect of HV on capacity of a roadway. This factor converts HV to units that are unified, which is the passenger car unit (PCU). There are various ways to determine PCE values, in this effort, the lagging headway method is used. This effort also discusses the effects of gradient towards the speed of an overloaded HV and thus correlate to the PCE value. Lagging headway method uses the mean lagging headway of HV and passenger car to estimate the value of PCE. This method takes into consideration the length of vehicles, which represents the amount of space that a HV occupies. Another method that is similar is also used as a comparison to the primary method, which is the leading headway method. This method is similar to the lagging headway method, but instead uses the leading headway maintained by HV to calculate the PCE value."