Optimization of urban traffic control system

Urban Traffic Management System

OPTIMIZATION OF URBAN TRAFFIC CONTROL SYSTEM

Riza Atiq Abdullah bin O.K. Rahmat

Data collection

Optimum cycle time and green time split

Offset determination

Phasing sequences

Setting up signal controller on site

Traffic control expert system

Proposed automatic and intelligent urban traffic control

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 route

Queue length and delay survey at all approaches of the intersections under this study

Step 1

Bangi

Kajang Toll

I-1I-2I-3I-4I-5

I-1I-2I-3

I-4I-5

Peak Hour Traffic Count

Bangi

Kajang Toll

I-1I-2I-3I-4I-5

Step 2

Step 3: Optimazation

1G=49A=3Rall=2

I-1

2G=9A=3Rall=2

3G=47A=3Rall=2

1G=78A=3Rall=2

I-2

2G=8A=3Rall=2

3G=19A=3Rall=2

1G=72A=3Rall=2

I-3

2G=13A=3Rall=2

3G=20A=3Rall=2

1G=72A=3Rall=2

I-4

2G=11A=3Rall=2

3G=22A=3Rall=2

I-5

1G=24A=3Rall=2

2G=21A=3Rall=2

3G=27A=3Rall=2

4G=28A=3Rall=2

0

500

1000

1500

2000

2500

3000

0 100 200 300 400 500 600

Time (s)

Dis

tan

ce (

m)

Step 4

Uncoordinated Signalised Intersection

0

500

1000

1500

2000

2500

3000

0 100 200 300 400 500 600

Time (s)

Dis

tan

ce (

m)

Bandwidth

Step 4

Coordinated signalised intersection, providing progressive flow

Microsoft Excel Worksheet

Step 4: calculation of offset

Figure 22 Offset Setting

Step 4Bangi

Kajang Toll

I-1I-2I-3I-4I-5

1=78+2+3

2=8+2+3

0

3=19+2+3

Cy/Time=120s

6

1=72+2+3

2=13+2+3

03=

20+2+3

Cy/Time=120s

23

1=49+2+3

2=9+2+3

03=47+2+3

Cy/Time=120s

Relative Offset = 0, Absolute Offset =0

Relative Offset = -6, Absolute Offset =-6 Relative Offset = 23, Absolute Offset =0+23=23

1=24+2+3

2=21+2+3

03=

27+2+3

Cy/Time=120s

47

Relative Offset = 24, Absolute Offset =23+24 = 47

1=72+2+3

2=11+2+3

03=

22+2+3

Cy/Time=120s

Relative Offset = 6,Absolute Offset =6-6 = 0

2=28+2+3

TRAFFIC CONTROL CENTRE

MP

MP

MP

MP

Smart CameraMicroprocessor

Fixed-point to fixed-point communications