side friction
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2022 ◽  
Vol 10 (1) ◽  
pp. 27-44
Author(s):  
D. M Priyantha Wedagama ◽  
I Wayan Suweda ◽  
N. L. G Astariyani

2021 ◽  
Vol 5 (2) ◽  
pp. 48
Author(s):  
Ariyanto Ariyanto ◽  
Decky Rochmanto ◽  
Achmad Rafiul Umam ◽  
Khotibul Umam

<p><em>The vehicle density analysis survey is a survey conducted with the aim of knowing the size of the density and also the obstacle factors on the analyzed road. At the Bugel Kedung Jepara T-junction, the survey point is the middle point of the current conflict, or the meeting point of two heavy vehicle flows, from the flow of vehicles originating from the traffic light at the junction of Pecangaan Walisongo Jepara and the flow of vehicles originating from the Mantingan Jepara red light intersection. The survey results on Thursday and Sunday, on Thursday can represent the effective working day, the degree of saturation is 0.16 pcu / hour, 2 seconds delay for a total of 5796 vehicles, the side friction is 223.8, indicating that the level of side resistance (L) low. The results of the calculation of vehicle density using the Greenshields Method show that after analyzing the survey results at point IV, the densest point is at point V, which is at the red light junction of Walisongo, Pecangaan Jepara, which occurs during the peak hours of the afternoon at 16.00 - 17.00 WIB. Vehicle density = 36.31 pcu / hour and the level of road service (B) with a LOS analysis value of 0.31 including good. To minimize the occurrence of conflicts and accidents, at each I-V survey point it is necessary to add a caution sign or additional signs on each road segment</em><em></em></p>


2021 ◽  
Vol 56 (5) ◽  
pp. 265-274
Author(s):  
Made Mahendra ◽  
Achmad Wicaksono ◽  
Ludfi Djakfar

The effect of side friction activities on delays due to the reduced free-flow speed was investigated by conducting a series of traffic surveys and referring to the 1997 Indonesian Highway Capacity Manual (IHCM) parameters. The movement of pedestrians, parking/stopping vehicles, vehicles entering and exiting the road, and the slow-and-stop motion of vehicles on the road sections was observed in video footage and analyzed to estimate the effect of side friction on the delays occurring. A weighting factor was used to determine the total value of side friction on the road to test the combined effect of all activities. This study used a regression model for estimating vehicle delays, as a performance parameter, on urban road sections, taking into account the effect of side friction on the road section's vehicle free-flow speed (FFS). It was found that vehicle speed decreased when side friction increased at all levels of traffic volume. Low side friction produced a higher vehicle free-flow speed (FFS), and analysis of the free-flow speed (FV) showed a lower vehicle free-flow speed (FFS) than that in the 1997 IHCM analysis. Delays at undersaturated inseparable one-way road sections (2/1 UD) with low to high side friction were described by the equation: Y = 0.002 X + 0.028 (R2 = 0.704) for Panca Usaha Road, and Y = 0.0022 X + 0.0104 (R2 = 0.774) for Pejanggik Road, where Y = Delay, X = Traffic Flow. The results of the above study indicate the existence of new performance parameters on urban road segment type 2/1 UD in the form of delay, and that can be an early indication as input in the update of IHCM 1997 and other research that the author has done before, as well as other authors who have also written about similar topics about this manual that is more than 20 years old (1997-2021), in analyzing the performance of road networks in Indonesia.


2021 ◽  
Vol 878 (1) ◽  
pp. 012048
Author(s):  
F E Gosal ◽  
E Tambunan

Abstract DI Panjaitan street has a heavy traffic congestion on the-day-of-workday especially during peak periods from 7 am to 9 am and 5 pm to 7 pm. This research aims to determine the level of service of DI Panjaitan street especially during peak hours that caused by the traffic flow and the side friction of road. The level of service was determined by using Indonesian Highway Capacity Guidance or IHCG 2014 and the most influential variable of the side friction was determined by using multiple linear regression analysis in SPSS. The research shows that DI Panjaitan street has the level F on Monday during peak hours from 7 am to 9 am and between 5 pm to 7 pm and level from C to D occurred from Tuesday to Friday. The most influential variable of the side friction was determined by equation 0.157+ 0.002 X1 + 0.001 X2 + 0.002 X3. The research shows that the park & stop vehicle, exits + enters, not motorized vehicle, strongly correlates to the value of degree saturation with a correlation coefficient (R) of 0.792.


2021 ◽  
Vol 14 (20) ◽  
Author(s):  
Yeqing Tian ◽  
Zhijun Zhou ◽  
Yaqin Dong ◽  
Kangchao Wang ◽  
Hongming Feng

2021 ◽  
Vol 4 (3) ◽  
pp. 783
Author(s):  
Muhamad Faisal ◽  
Najid Najid

Overcrowding often occurs in DKI Jakarta, especially on Jalan Gatot Subroto. This location is one of the biggest business centers in Jakarta. Roadside activities that impede traffic flow are called side friction. Side friction is an impact on traffic performance resulting from road segment activities. Highway capacity is also influential. That happens because the available highway capacity is no longer able to accommodate the increasing traffic flow. Therefore, research was conducted. To calculate the highway capacity, observations were made to see the number of vehicles. It takes the perception of side frictions using questionnaire data. Questionnaire data collected  100 respondents. So, the results show that section is in the VL (Very Low) side obstacle class, which occurs in the morning while the L (Low) side obstacle class occurs in the afternoon and evening. The results estimation of the side drag factor data shows that the volume is greater than the highway capacity. The correlation between observation data and questionnaire results vehicles parked or stopped on the side of the road and vehicles from roadside access have a sequential weight order, while pedestrians and non-motorized vehicles have non-sequential weights. Further research to expand the questionnaire and get more precise results. ABSTRAKKepadatan sering terjadi di DKI Jakarta khususnya di Jalan Gatot Subroto. Lokasi ini salah satu pusat bisnis terbesar di Jakarta. Aktivitas sisi jalan dapat menghambat arus lalu lintas disebut hambatan samping. Hambatan samping merupakan dampak terhadap kinerja lalu lintas yang dihasilkan dari aktivitas segmen jalan. Selain itu, kapasitas jalan juga berpengaruh. Hal ini terjadi karena kapasitas jalan yang tersedia sudah tidak mampu untuk menampung arus lalu lintas yang semakin tertambah kepadatannya. Oleh karena itu dilakukan penelitian. Untuk menghitung kapasitas jalan, dilakukan observasi untuk melihat jumlah kendaraan. Selain itu, dibutuhkan persepsi hambatan samping menggunakan data kuesioner. Data kuesioner terkumpul sebanyak 100 responden. Maka, hasil menunjukan ruas Jalan Gatot Subroto berada di kelas hambatan samping VL (Very Low) terjadi di waktu pagi hari sedangkan kelas hambatan samping L (Low) terjadi di waktu siang dan sore hari. Hasil dari estimasi faktor hambatan samping data menunjukan volume lebih besar daripada kapasitas jalan. Korelasi anatra data observasi dengan hasil kuesioner menunjukan bahwa kendaraan parkir atau berhenti di sisi jalan dan kendaraan dari akses sisi jalan memiliki urutan bobot yang berurutan sedangkan untuk pejalan kaki dan kendaraan tidak bermotor memiliki bobot yang tidak berurutan. Penelitian selanjutnya, diharapkan dapat memperluas kuesioner dan mendapatkan hasil yang lebih tepat.


2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Rui Zhang ◽  
Chuanxun Li ◽  
Dandan Jin

The aim of this paper is to analyze the buckling stability problem for piles in the slope foundation based on cusp catastrophe theory. Formulation of critical buckling load of piles in the slope foundation is obtained. The influential factors of slope angle, distribution of landslide thrust behind the pile, pile-embedded ratio, pile constraints, pile-side friction, pile-side soil resistance, and pile socketed ratio upon buckling stability characteristic for piles in the slope foundation are examined. The results reveal that when pile diameter remains unchanged, critical buckling load increases with the increase of pile length when pile-embedded ratio reaches 60%. When pile length remains unchanged, critical buckling load increases with the increase of pile diameter. Critical buckling load with the assumption of nonlinear horizontal elastic resistance of pile-side soil in the paper is more close to the value based on horizontal elastic resistance of pile-side soil suggested in the code. When slope angle increases, decreased extent of buckling critical load for piles 30–60 m in length is more obvious than the piles which are 10–30 m in length. Strengthening of pile constraints and increase of pile-embedded ratio and socketed ratio are helpful to pile critical buckling load increase. The influential factors of pile-side friction and landslide thrust behind the pile upon pile critical buckling load are tiny and can be neglected.


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