The highway is one of the infrastructure for the smooth traffic. One part of the road that are considered necessary to be analyzed and evaluated is an intersection. Three Gadut intersection is non signalized intersection. The traffic flow is quite dense, and lack of discipline of road user factors competing space to pass the crossing, resulting in congestion is very influential on traffic conditions at peak hours in the morning, afternoon and evening. Prior to conducting the survey, the first to do is survey the condition of the intersection that includes geometric characteristics and traffic volume. From the analysis of environmental data, side friction factor to the junction of three Gadut is the criteria being. Rated capacity (C) the smallest is 3706.3 smp/hour, the degree of saturation of 1.1 smp/hour. This value is over the limit permitted values manually indonesian road capacity of 0.8 to 0.9 (1.1> 0.9), it is concluded that the traffic flow is the crossroads of three Gadut saturated traffic flow. The queue probability value between 128.8% - 157.4% with a total delay largest average 11.57 seconds/smp. It is concluded that the chances of a queue at the intersection of three Gadut very large, so it could cause congestion.
Terciptanya suatu sistem transportasi yang menjamin pergerakan manusia, kendaraan dan barang secara lancar, aman, nyaman dan sesuai dengan lingkungan, merupakan tujuan pembangunan. Dalam perencanaan, perancangan dan penetapan berbagai kebijakan sistem transportasi, teori pergerakan arus lalu lintas memegang peranan penting. Arus lalu lintas yang melewati suatu ruas jalan tidaklah konstan, tetapi tergantung dari pola kegiatan dan tingkat pertumbuhan pemakai jalan, karena semakin besarnya pertumbuhan akan mengakibatkan kemacetan pada ruas jalan yang dilewatinya. Volume lalu lintas dapat didefinisikan sebagai jumlah kendaraan yang melewati bagian panjang tertentu pada suatu jalur atau jalan dalam jangka waktu tertentu. Pada arus lalu lintas sering terjadi kendaraan yang saling beriringan dengan kecepatan yang sangat beragam serta banyaknya kapasitas kendaraan yang melewati jalur atau jalan yang sama sehingga akan menimbulkan kepadatan. Hambatan samping adalah dampak terhadap kinerja lalu lintas dari aktivitas segmen jalan. Hasil analisa data yang telah dilakukan, tahap I hari senin 07 Oktober 2019, didapatkan nilai volume atau kapasitas sebesar 3360 smp/jam, nilai level of service adalah 0,47 dan mempunyai level of service C. Tahap II hari sabtu, 12 Oktober 2019 didapatkan nilai volume atau kapasitas sebesar 3643,12 smp/jam, nilai level of service adalah 0,70 dan mempunyai level of service D.
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