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Transportation Research Board 2004 Annual Meeting. Adaptive Signal Control Workshop Session 2: Field Experience January 11, 2004. Orange County SCOOT System. By: Hazem El-Assar, P.E. Presentation Outline. Background Challenges Potential Solutions Why SCOOT? Project Description

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transportation research board 2004 annual meeting

Transportation Research Board2004 Annual Meeting

Adaptive Signal Control Workshop

Session 2: Field Experience

January 11, 2004

orange county scoot system
Orange County SCOOT System

By: Hazem El-Assar, P.E.

presentation outline
Presentation Outline
  • Background Challenges
  • Potential Solutions
  • Why SCOOT?
  • Project Description
  • Benefits Achieved
  • Difficulties Faced
  • Lessons Learned
occc expansion facts
OCCC Expansion Facts
  • 3 million square foot complex:
    • 2.1 million s.f. of exhibition space
    • 166,050 s.f. of meeting rooms
    • 92,000 s.f. of general assembly space
    • 3,600 parking spaces
    • Total cost $748 million
    • Opened November 2003

MULTIPLE EVENTS

UP TO 80,000 ATTENDEES EACH

potential solutions
Potential Solutions
  • Free uncoordinated signals
  • Officer traffic control
  • TOD signal coordination
  • Traffic Responsive Plans
  • Adaptive Signal Control
scoot adaptive signal control
SCOOT Adaptive Signal Control

plit

S

C

ycle

ffset

O

ptimization

O

T

echnique

why scoot
Why SCOOT?
  • Uses real-time upstream flow to adjust timing
  • Better suited for high volume minor movements
  • Widely used worldwide since 1981
  • Compatible with County’s existing Eagle signal controllers
  • No need for additional field staff training
  • More cost effective installation under current conditions
how scoot works
Vehicle Detector

Local Controller

Central Computer

How SCOOT Works
central computer
Central Computer
  • SCOOT server
    • DEC Alpha running VMS
  • Operator workstations
    • PC running Windows
    • LAN connected via X-Windows emulation
    • Remote dial-ins via terminal servers
    • Interface to existing network and workstations using MONARC (now ACTRA)
communication system
Communication System
  • Transmission Media
    • County-owned fiber optic on arterial streets
    • FDOT fiber optic on I-4
  • Communications Methodology
    • Single Mode fiber optic
    • Multi Mode fiber optic
local controllers
Local Controllers
  • Existing cabinets
  • New Eagle EPAC 300 controllers with SCOOT module
  • Dedicated communication unit
  • SCOOT detectors
project location
Phase III

Phase I

Phase II

Project Location
  • General location:
  • International Drive
  • Universal Boulevard
  • Primarily Serving:
  • Convention Center
  • Parking Garages
  • Hotels & Restaurants
  • Tourist Attractions
project schedule
Project Schedule
  • Phase I: May 2000
    • 7 New Signals
  • Phase II: November 2001
    • 6 New Signals
  • Phase III: October 2003
    • 4 New Signals
    • 2 Modified Signals
project scope
Project Scope
  • Replace existing controllers
  • Install fiber optic communications
  • Install loop detectors
  • Provide central hardware and software
  • Setup and validate the system
  • Design system maps and intersection graphics
  • Provide training to County staff
project costs
Project Costs
  • Controller Upgrades $2,500 - $5,000/ intersection
  • Detectors $10,000-15,000/ intersection
  • Communications $2,500-$5,000/ intersection
  • System Configuration, $5,000-$7,500/

Validation, Fine Tuning intersection

  • Central Hardware/Software $50,000
operational benefits achieved
Operational Benefits Achieved
  • Convention Center traffic ingress & egress has been cleared efficiently
  • Overall travel times and delays have been reduced
  • Officer control of signals is no longer necessary
  • Regular development and update of timing plans is not necessary
  • Timing adjustment during long or short term lane closures is not necessary
  • Real-time traffic data are monitored and archived
annual cost comparison
Annual Cost Comparison
  • Detectors +$1,000/intersection
  • Support Agreement +$34,000
  • Central System $0
  • Controllers $0
  • Communications $0
  • Staff $0
  • Manual Traffic Control -$450,000

Net Annual Savings ~$400,000

difficulties faced
Difficulties Faced
  • No detectors on short links
  • Long pedestrian phases
  • Non-flexible phasing sequence
  • Low volume traffic conditions
  • Non-optimal signal progression
  • Insufficient staff experience
  • Only remote technical support
lessons learned
Lessons Learned
  • TOD plans may provide better progression for recurring traffic conditions
  • Negative impacts may occur in low volume traffic conditions
  • Pre-determine optimal phasing based on traffic conditions or using other software
  • Place detectors on all lanes, if possible
  • Avoid long pedestrian crossings
thank you
Thank You!

Hazem El-Assar, P.E.

Senior Engineer

Orange County Traffic Engineering

4200 S John Young Pkwy

Orlando, FL 32839

Ph: (407) 836-7866

Fx: (407) 836-7825

E-mail: [email protected]

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