Transcript SCATS Adaptive Traffic System

SCATS Adaptive Traffic System
TRB Adaptive Traffic Control Workshop
January 2000
Session 2 - Equipment Requirements
For further information contact:
Neil R. Gross
[email protected]
SCATS Architecture
Management
Functions
Strategic
Traffic
Control
Regional
Computer
Traffic Controllers Tactical Traffic Control
Regional
Computer
Central
Management
System
Regional
Computer
Regional
Computer
Regional
Computer
1 to 32
up to 250 per
Regional Computer
2
SCATS System Architecture
Minimal System - Single Region
Dial-in
Workstation(s)
Re gional
Com pute r
SCATS Traffic
Controllers
Up to 250 per
Regional Computer
Operator
Workstations - serial
or LAN connected
Point-to-Point or Multidrop
connected Traffic Controllers
3
SCATS System Architecture
SCATS 1 - with Integration Server
SCATS Interface Server
Regional
ATMS,
ATIS
Services,
ITMS
Operator
Workstations
DEC VAX
SCATS Management Computer
Dial-in
Workstation(s)
Datalink
External
LAN
SCATS LAN
Up to 32 Regional Computers
Local Regional
Computers
Remote Regional
Computer(s)
SCATS Traffic
Controllers
Up to 128 per
Regional
Computer
Ramp Metering
Controllers
Point-to-Point
connected Traffic
Controllers
Multidrop connected Traffic Controllers
Mixed Connection
4
Configuration - SCATS2
Operator
Workstations
Regional ATMS,
ATIS Services,
ITMS
SCATS LAN
SCATS Management
Computer
Local Regional
Computers
SCATS Traffic
Controllers
Up to 250 per
Regional
Computer
Datalink
Dial-in
Workstation(s)
Up to 32 Regional Computers
Remote Regional
Computer(s)
Ramp Metering
Controllers
Point-to-Point
connected Traffic
Controllers
Multidrop connected Traffic Controllers
Mixed Connection
5
SCATS Sensors
• Controller collects number of spaces and total
space time during green of each movement, each
cycle for use by SCATS adaptive algorithm.
• Actual movement data collected by stop line
detectors allows accurate split determination.
6
SCATS Sensors
• Loop Detectors or
equivalent (video
detection in Oakland
County MI) in most
lanes at the stop line.
• Some lanes can be left
without detectors.
7
Communications - SCATS1
LAN-TCP/IP
or FD Data
line
CM S
(Ce ntral
m anage m e nt
Com pute r)
LAN or
RAS/PPP
LAN/
WAN
TCP/IP
Ope rator
Work s tations
Re gional
Com pute rs
300 Bps Point-toPoint (Bell 103)
or
1200/2400 Bps
Multidrop (V22/
V22bis)
Controlle rs
Othe r ITS
Sys te m s
De lta 3N
SCATS 170
8
Communications - SCATS2
CM S
(Ce ntral
m anage m e nt
Com pute rs )
LAN or
RAS/PPP
Ope rator
Work s tations
LAN-TCP/IP
or FD Data
line
Re gional
Com pute rs
LAN/
WAN
NTCIP
Ce nte r -to
Ce nte r
Othe r ITS
Sys te m s
SCATS Protocol
(TCP/IP-PPP-V34)
or
NTCIP Standard
Global Obje cts (plus
s e le cte d s pe cial
M IB)
Controllers
SCATS 170
SCATS 2070
SCATS 2070N
US NTCIP
NTCIP
Clas s B
Othe r Traffic
De vice s (e .g.
Signs )
9
SCATS Traffic Controllers -Existing
170
• AWA Delta 170 upgrades
existing 170 controller to
support SCATS.
• Relay Module added for
sense/control of cabinet
status.
NEMA
• AWA Delta 3N controller
replaces existing NEMA
controller.
• Connections are via
existing A, B and C
connectors.
• One back-panel link
required.
1
SCATS Traffic Controllers -Planned
• SCATS 2070
• SCATS 2070N
1
SCATS Hardware Requirements
• Management Computer - Database and Mgt
Systems
– SCATS 1 DEC VAX/ALPHA, OpenVMS
– SCATS 2 Networked PCs
• Regional Computer - Strategic Control
– Personal Computer with Windows NT
– Digi Serial Interface system.
1
SCATS Hardware Requirements
• Operator Workstations - Up to 15
– Personal Computer with Windows NT or Windows 98
• SCATS Controllers - Tactical Control
– up to 250 per Regional Computer
1
SCATS Installation Cost Ranges
64 Intersection System
• Central Hardware approx. $ 30,000 (small VAX)
• Central Software approx. $40K to $70K
• Regional Hardware approx $20K
• Regional Software approx $70K
1
SCATS Installation Cost Ranges
64 Intersection System
• Local Controllers approx. $3.5K to 5.5K, total say
$300K
• Communication Network - Included above
• Detection Sensors …. Standard loop amplifiers
and 6 x 15 loops…..$230K?
• Total - approx $650K for single Regional (No
CMS)
1
SCATS Operations & Maintenance Cost
Ranges - 64 Intersection System
•
•
•
•
•
Central Hardware approx $3K per annum
Central Software approx $4K per annum
Regional Hardware - negligible.
Regional Software approx $8Kpa
Regional Setup & Support - similar to current
support level plus quarter to half man year per
annum.
1
SCATS Operations & Maintenance Cost
Ranges - 64 Intersection System
• Local Controllers - similar to current controllers
• Communication Network - User owned TWP? or
VG Leased Line approx $22/month
• Detection Sensors …loop maintenance? Depends
on quality of original installation and road
surface...
1
End
Thank You