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# Optimization of urban traffic control system

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This slide is part of Urban Traffic Control course
http://www.eng.ukm.my/riza/UTMS/UrbanTMS.htm

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### Optimization of urban traffic control system

1. 1. Urban Traffic Management System OPTIMIZATION OFURBAN TRAFFIC CONTROL SYSTEM Riza Atiq Abdullah bin O.K. Rahmat
2. 2. Data collection Phasing sequences Optimum cycle time and green time split Proposed automaticTraffic control expert and intelligent urbansystem traffic control Offset determination Setting up signal controller on site
3. 3. Step 1 Peak hours classified traffic count at all approaches of the intersection under study. 16-hour traffic count at road links between intersections under this study Travel time survey along the study arterial routeQueue length and delay survey at all approaches ofthe intersections under this study
4. 4. I-5 I-1 I-4 I-3 I-2 BangiKajangToll
5. 5. Peak Hour Traffic CountI-3 I-2 I-1 I-5 I-4
6. 6. Step 2 I-5 I-1 I-4 I-3 I-2 BangiKajangToll
7. 7. Step 3: Optimazation
8. 8. I-5 I-4 I-3 I-2 I-1 ϕ1 ϕ1 ϕ1 ϕ1 ϕ1 G=24 G=72 G=72 G=78 G=49 A=3 A=3 A=3 A=3 A=3 Rall=2 Rall=2 Rall=2 Rall=2 Rall=2ϕ2 ϕ2 ϕ2 ϕ2 ϕ2G=21 G=11 G=13 G=8 G=9A=3 A=3 A=3 A=3 A=3Rall=2 Rall=2 Rall=2 Rall=2 Rall=2ϕ3 ϕ3 ϕ3 ϕ3 ϕ3G=27 G=22 G=20 G=19 G=47A=3 A=3 A=3 A=3 A=3Rall=2 Rall=2 Rall=2 Rall=2 Rall=2 ϕ4 G=28 A=3 Rall=2
9. 9. Step 4 3000 2500 2000 Distance (m) 1500 1000 500 0 0 100 200 300 400 500 600 Time (s) Uncoordinated Signalised Intersection
10. 10. Step 4 3000 2500 2000 Distance (m) Bandwidth 1500 1000 500 0 0 100 200 300 400 500 600 Time (s)Coordinated signalised intersection, providing progressive flow
11. 11. Step 4: calculation of offset Microsoft Excel Worksheet
12. 12. Step 4 I-5 I-4 I-3 I-2 I-1 Bangi Kajang Toll Relative Offset = 24, Relative Offset = 6, Relative Offset = 0, Absolute Offset =0 Absolute Offset =23+24 = 47 Absolute Offset =6-6 = 0 0 ϕ 2= 0 ϕ 3= 0 28+2+3 ϕ 3= 47+2+3 27+2+3 ϕ 3= 22+2+3 47 ϕ 1= Cy/Time Cy/Time =120s 49+2+3 =120s Cy/Time =120s ϕ 2= ϕ 2= 21+2+3 11+2+3 ϕ 1= ϕ 1= ϕ 2= 24+2+3 72+2+3 9+2+3 Relative Offset = 23, Absolute Offset =0+23=23 Relative Offset = -6, Absolute Offset =-6 ϕ 3= 0 20+2+3 0 ϕ 2= 23 6 13+2+3 ϕ 3= 19+2+3 Cy/Time ϕ 1= Cy/Time =120s 78+2+3 =120s ϕ 2= 8+2+3 ϕ 1= 72+2+3
13. 13. Smart Camera MicroprocessorM MP M M P P P Fixed-point to fixed-point communications TRAFFIC CONTROL CENTRE