TRAFFIC DENSITY
TOTAL ROAD MANAGEMENT SYSTEM ADRO
SEPT’ 2013
04. Haul Road Traffic Density
- Deskripsi : Kepadatan arus lalulintas jalan tambang.
- Sasaran pelatihan :
a.Memahami konsep kepadatan arus lalulintas jalan tambang.
b.Memahami tahapan perhitungan kapasitas jalan tambang.
LATAR BELAKANG
1. Komitmen annual meeting OPRENG, Bandung’13
Travel speed . (HD785)
Reference :
Engineering data base 2012, Speed 2012, File.xls
Target’13
- (ABKL,ARIA,BCSK,INDO,KCMB,KPCS,TCMM,TOPB, BEKB,ASMI) Travel speed average =20km/hr Based on operation policy
- (ADRO,BAYA,KIDE,MTBU) : Increase travel speed average 5%.
COAL SEAM COAL SEAM COAL SEAM
D D
D = Safety distance Stopping Distance
Stopping Distance -- ???
Vertical sight distance
Horizontal sight distance
COAL SEAM COAL SEAM COAL SEAM
D D
L (meter)
- V Tetap D Terkoreksi - D Tetap V Terkoreksi
“Diperlukan Tinjauan terkait kinerja lalulintas guna menjaga kecepatan
ideal serta jarak aman kendaraan beriringan”.
Traffic Performance/ Kinerja lalulintas ???
“ Parameter ukur tingkat layan suatu ruas jalan terkait karakteristik penggalan segmen terhadap pencapaian operasional dengan mengacu kepada
standar keselamatan ”
1. Perencanaan kinerja lalulintas
2. Evaluasi kinerja lalulintas
- Pemilahan ruas jalan menjadi segmen-segmen kecil yang memiliki
karakteristik sejenis.
- Kemiringan jalan (grade) relatif sama.
- Kondisi permukaan relatif sama : Jalan dengan perkerasan dibaca sebagai segmen berbeda.
- Persimpangan : Persimpangan merupakan awal/akhir suatu segmen.
- Kondisi khusus : Tikungan dengan radius putar kecil, penyempitan jalur dll
- Target Travel speed : 20Km/jam.
- Batasan : Geometri jalan, Kondisi unit, Skill operator “Dibutuhkan Kebijaksanaan dari
Perencana”
COAL SEAM
COAL SEAM COAL SEAM COAL SEAM COAL SEAM COAL SEAM COAL SEAM
COAL SEAM
V = 0 km/jam
D
D h D D D D h
D1 = the distance that the vehicle travels during the time it takes for the driver to recognize that a stop is necessary and push on the brake pedal.depending on driver reaction time.
D2 = the distance traveled in the time necessary for actuation of the braking system after the pedal is depressed.depending on the size of the truck and the braking system
D3 = the distance that the fully-applied brakes need to bring the vehicle to a stop. depends on the speed of the vehicle when the brakes are applied .
COAL SEAM
D1 D2 D3
TOTAL STOPPING DISTANCE = D1 + D2 + D3
Reference :
MSHA Handbook Series.
U. S Department of Labor
Mine Safety and Health Administration Coal Mine Safety and Health
Metal and Nonmetal Mine Safety and Health June 1999
Reference :
MSHA Handbook Series.
U. S Department of Labor
Mine Safety and Health Administration Coal Mine Safety and Health
Metal and Nonmetal Mine Safety and Health June 1999
Stopping distance (m)
Equation 1.
a D
1= V
ox DPRT Where :
V
o= Vehicle speed (Km/hr)
DPRT = Driver Perception Response Time (2,5 Second)
V
b= Vehicle speed at the end of brake system response time. (Km/hr)
g = Gravity acceleration. 9,81 m/s
2g
eff= Effective grade (%)
BSRT = Brake system response time, (Second)
f = Coefficient of friction available for braking.
Equation 2.
a. D
2= BSRT x Vo
Equation 3.
a. D
3= V
2b...
2g x (f- g
eff)
Truck Weight (Tons) BSRT
Loaded Empty Loaded Empty
HD 465 98 42,8 2 1,5
HD 785 166 72 2,25 2
HD 1500 250 105,3 2,5 2
730E 325 140 2,5 2,25
+
1.000 m
Maximum density= 1.000 m (D+h)
- Jumlah unit pada suatu segmen jalan dengan panjang tertentu, dimana kendaraan berada dalam range jarak aman beriringan.
- Dinyatakan dalam unit/km.
COAL SEAM
COAL SEAM COAL SEAM COAL SEAM COAL SEAM COAL SEAM COAL SEAM
COAL SEAM
V = 0 km/jam
D
D h D D D D h
- Average Loaded speed = 19,5 km/jam.
- Average empty speed = 24 Km/jam - Average grade = 3% Jalan 2A
Degree of Saturation =1
Nilai kepadatan (Kendaraan/Km) pada kondisi muatan, unit acuan HD-785, SF 1,35
Nilai kepadatan (Kendaraan/Km) pada kondisi kosongan, unit acuan HD-785, SF 1,35
Seg men 1 Segmen 2
Resume
1. Jelaskan mengenai konsep kepadatan jalan tambang ??
Jalan dikatakan padat jika : jumlah hauler yang melintas pada suatu segmen jalan sudah melebihi kapasitas Hauler maksimal yang dihitung berdasarkan prinsip jarak aman kendaraan beriringan.
2. Jelaskan tahapan evaluasi kepadatan arus lalulintas jalan tambang ??
1. Perencanaan kinerja lalulintas
2. Evaluasi kinerja lalulintas
