Perkembangan pembangunan baik bangunan maupun infrasrtuktur sangat pesat. Ditambah program pembangunan dari pemerintah pada tahun belakangan ini yang meningkat drastis. Pembangunan tersebut membutuhkan batako untuk pemasangan dinding rumah maupun dinding pagar dan seiring dengan permintaan batako yang meningkat, tentu perlu adanya inovasi batako. Penambahan zat karbon pada pembuatan batako sebagai penambah material pasir dijadikan inovasi bahan tambahan. Maka diperlukan penelitian ini dibuat untuk mengetahui pengaruh zat karbon pada kuat tekan pada batako yang sesuai pada SNI 03-0349-1989 tentang bata beton untuk pasangan dinding. Pencampuran zat karbon dalam pembuatan batako adalah 0%, 5%, 10%, dan 15% dari berat pasir yang diperlukan, campuran semen yang digunakan: 25%: 70%:5% yang mengacu pada Pedoman Teknis yang dikeluarkan oleh Departement Pekerjaan Umum tahun 1986. Penelitian ini merupakan penelitian eksperimen dan bentuk cetakan Kubus berukuran 0,15 x 0,15 x 0,15m, sebanyak 12 buah untuk pengujian kuat tekan yang sudah dicampur dengan penambahan zat karbon. Pada umur 7 hari dilakukan pengujian sesuai syarat yang ditentukan dan kuat tekan batako harus memenuhi persyaratan mutu sesuai dengan SNI-03-0349-1989. Hasil uji kuat tekan Batako dilakukan memperoleh hasil kuat tekan batako normal sebesar 259,783 kg/cm2. Batako dengan campuran 5% mendapatkan hasil sebesar 352,893 kg/cm2. Campuran serbuk karbon aktif dengan 10% mendapatkan hasil kuat tekan tertinggi yaitu sebesar 393,293 kg/cm2. Maka dengan penambahan serbuk karbon sebesar 10% sebagai penambah agregat halus (pasir) merupakan pilihan yang tepat. Terjadinya penurunan kuat tekan benda uji 15% yang dikarenakan kurangnya pemadatan yang maksimal pada saat penelitian serta yang masih berusia 7 hari.
Indonesia is a country that is included in the top 5 rankings as the country with the most Population, with a population of 276 million people. Jalan Gajah Mada is one arterial road in Sekupang District, Batam City. Jalan Gajah Mada is often used to going to work and school. This has caused Jalan Gajah Mada to become one of the congestion points in Batam. This study aims to determine the effect of diverting cross-traffic flow on road performance during peak hours, namely morning or evening. The method used in this study is quantitative. The data used in this study consisted of primary data and secondary data. The primary data includes location conditions, road dimensions, number of vehicles, and vehicle speed. At the same time, the secondary data needed are the location map, data population, and land use. The location of the selected road performance analysis study. From the survey results, it can be concluded that Jalan Gajah Mada has a relatively good level of road service. The vehicle speed at the diversion of traffic flow is 48.78 Km/h, and the speed before the diversion of traffic flow is 26.16 Km/h.
KRL Commuter Line is an adequate means of public transportation and has a vital role in the activities or activities of the general public in the Jabodetabek area. However, since the Indonesian government declared a state of emergency and the coronavirus outbreak a national disaster due to the spread of the Covid-19 virus in March 2020, it has impacted the service system Commuter Line KRL operations. With the Covid-19 virus, PT Kereta Commuter Indonesia has created a new operational service system to continue providing exemplary service so that KRL Commuter Line service users remain safe and comfortable. Furthermore, PT Train Commuter Indonesia implements regulations and policies following government regulations to stop the spread of Covid-19, such as implementing protocols health of KRL Commuter Line service users, thereby affecting travel patterns. Therefore, the authors want to research the behavior of transportation users on the public KRL Commuter Line in the New Normal Period. The writer also wants to know the public's perception of the applicable health protocol regulations and policies and whether they affect KRL Commuter Line passenger trips.
The city of South Jakarta is a dense metropolitan city because it has a high population growth rate. Due to this population growth, the city of South Jakarta has experienced additions, expansion of social facilities and infrastructure as well as transportation to serve the needs of its residents, one of which is the Lenteng Agung-West Tanjung Flyover Development Project. The infrastructure built has an impact on traffic congestion on the performance of the Lenteng Agung-Tanjung Barat road and Pasar Minggu intersection. The purpose of this study is to determine road performance and to know strategies that can be used to overcome the impact of traffic congestion. The method used in this analysis and discussion is based on the Indonesian Road Capacity Manual (MKJI), 1997 and conducts a field survey for the performance of roads and intersections without signals. The results of the research obtained on the performance of the Unmarked Intersection road are the largest traffic volume of the Unmarked Intersection which is obtained from the survey results on Friday 18 December 2020 and the peak hours are at 06.30-07.30 WIB With the degree of saturation DS = 0.66, the delay at the intersection is 10.85 sec / pcu and the chances of queuing are 36.97% -17.96%. In the analysis of the Lenteng Agung road section, the highest level of service was obtained on Monday, November 16 2020 in the morning at 07: 30-08.30, with a degree of saturation of 0.98 having a service level of E, which means the flow is unstable. Meanwhile, in the afternoon, 16: 00-18: 30 with a saturation degree of 0.53 and has a service level of B.
The prolonged period of the COVID-19 pandemic has paralyzed various sectors of economic activity. Jakarta is the capital city of Indonesia with the highest risk of transmission, including those significantly affected. Entering the new-normal era with the relaxation of The Public Activity Restrictions Implemented (PPKM) has given new hope for the movement of these various activities, including public transport services. Public transport users want a level of service that is quite adequate and can provide security against exposure to COVID-19. In connection with this, it is necessary to study the variables that influence the choice of public transportation modes according to users. This study aims to determine the variables of public transport services that affect users' preferences during the relaxation of the PPKM and measure the sensitivity of individual responses in choosing the mode. This research uses a descriptive-analytical method and analysis using multiple linear regression. Data was collected by distributing questionnaires with stated preference techniques. The results show that the variables that affect users in using public transport during PPKM are 1) occupancy restriction, 2) social distancing, 3) health protocol, 4) COVID-19 task force, 5) travel cost and 6) time travel. Furthermore, the public transport selection variable is more sensitive to occupancy restrictions and social distancing based on the elasticity analysis.
Purpose: Delays are common in construction projects. The term "project delay" refers to a project's completion date later than anticipated. Lack of performance by contractors or project managers in resolving issues can result in project delays. The factors that cause project delays must be considered to reduce delays. This study aims to examine the elements contributing to Batam island’s pile foundation construction delays.
Findings: The factor of delays is an important key of the analysis to prevent delays in future projects
Design/methodology/approach: This research uses a case study at Batam Island. The analysis is done with SPSS 26 program.
Research limitations/implications: Analysis of delay caused by pile foundation in Batam island.
Practical implications: Analysis of the delay caused by a project according to the result of the questionnaire.
Originality/value: Original Paper
Paper type: A Case Study
In today's globalized world, much software is developed to make work easier to implement. This software is demonstrated using AutoCAD Civil 3D® to demonstrate how geometric road design can be completed briefly. In this case, the purpose of geometric planning is to evaluate the effectiveness of manual geometric planning using AutoCAD Civil 3D®. This journal's geometric road planning implements qualitative methods. The geometric planning of the road that became the subject of this journal's research is located on Jalan Kertawangunan - Kadugede, with a road plan length of 9.3 km as an additional alternative to Kuningan Regency's new outer ring road. The calculation of horizontal alignment required the minimum bend (Rmin) and transition arch (Ls) values. Therefore, it is necessary to plan the assembly ahead of time before planning the corridor. The corridor's function is to determine the location of cut and fill based on road planning. As a result, planning a path with AutoCAD Civil 3D® is more effective and efficient, and it can retrieve the necessary data quickly. There are four points of interest with different types of curves in road traffic planning. The plan speed (Vr) was set to 60 km/h, the maximum superelevation slope (e-maks) was set to 0.08, and the transverse friction coefficient (f) was set to 0.153. The average excavation volume obtained from this planning is approximately 1,900,000 m3.
The COVID-19 pandemic has had an impact on transportation. The impact is still felt when COVID-19 subsidies and community activities have begun to return to normal. Public transportation modes Trains had not operated optimally before the pandemic, resulting in most people choosing bus transportation modes. The purpose of this study is to determine the community's behavior in choosing the mode of transportation between trains and buses on the Tasikmalaya - Jakarta travel route. The method used in this study used the state preference method with attributes of travel time, travel costs, and waiting time. Data analysis was carried out from questionnaire data shared with 100 respondents. The survey results were collected, and linear regression analysis and modeling were conducted using a binomial logit model. Linear regression analysis using the SPSS program obtained the results of the transportation mode selection model, namely (KA-BUS) = -0.293 – 0.389 (X1) – 1.944x10-5(X2) – 0.060 (X3) where X1 Travel time variable, X2 travel cost variable and X3 waiting time variable. It can be concluded that the bus mode of transportation, with a proportion of mode selection of 57.12 %, has a greater chance of being chosen by travelers than the mode of rail transportation, which has a proportion of mode selection of 42,875%.
Roundabouts are considered to play a role as an effective replacement for signalized intersections and reduce congestion in urban areas. The increase in vehicles each year causes roundabouts to be ineffective in distributing vehicles. This paper aims to analyze road performance. The research method was carried out by means of a field survey. Data was collected from the Tuah Madani Roundabout, Batam, Indonesia. The results show that the average speed is 46 km/hour and a small degree of saturation, with a good level of service. It is stated that the roundabout is still comfortable for motorists to pass through.
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