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Presentation on Adaptive traffic Systems

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SCATS 6. 4 now installed on 400 out of 650 sites. Also installed in Dun Laoghaire and Waterford city. Owned and developed by the RTA NSW ... – PowerPoint PPT presentation

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Title: Presentation on Adaptive traffic Systems


1
Presentation on Adaptive traffic Systems
  • Brendan OBrien
  • Head of Technical Services
  • Dublin City Council

2
Adaptive Traffic Control in Dublin
  • Sydney Co-ordinated Adaptive Traffic system
  • SCATS first installed on 32 sites in 1989
  • SCATS 6. 4 now installed on 400 out of 650 sites
  • Also installed in Dun Laoghaire and Waterford
    city
  • Owned and developed by the RTA NSW
  • One of only two Adaptive traffic systems to have
    a world wide base
  • 12,000 sites on SCATS world wide including Hong
    Kong, Mexico city, Oakland and Tehran

3
CYCLE TIME
  • The total time to complete one cycle of all the
    stages
  • Range 20 - 190 seconds

Typical range 40 - 160 seconds In City Council
40-120 Seconds
4
STAGE TIME (SPLIT)
  • The percentage of the cycle time
  • allocated to each stage

Stage A 55 Stage B 20 Stage C 25
5
OFFSETS
  • Offset defines the start of a nominated stage at
    one intersection relative to the start of a
    nominated stage at another intersection.

Offset
Defined by LP 10,15d120 or PP data 10,15d.
End of D Phase intersection 120
With respect to Master SS
6
How to Control Traffic ?
Signal Groups (SGs)
controller
7
8
2
1
3
7
How to Control Traffic ?
We may group these into 3 stages
controller
Stage A
7
1
8
How to Control Traffic ?
controller
Stage B
3
9
How to Control Traffic ?
controller
Stage C
2
8
10
Dublin System
Workstations
SCMS SERVER

LAN
Dassnet link to Waterford Dun Laoghaire
Fingal South Dublin
Region
CCity
Local Controller
Local Controller
Local Controller
Local Controller
Current Capacity 668 sites
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