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TRAFFIC SIGNAL MANAGEMENT

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Implement additional signal plans based on time of day/day of week ... Utilize New Technologies. TSM. Traffic Signal. Management. Traffic Signal System ... – PowerPoint PPT presentation

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Title: TRAFFIC SIGNAL MANAGEMENT


1
TRAFFIC SIGNAL MANAGEMENT
TSM
2
PURPOSE
  • Purpose Foster understanding through development
    of educational outreach materials
  • Illustrate benefits and basic techniques
  • Share information on new technologies
  • Highlight need for multi-municipal cooperation
  • Target Audience
  • Municipal Officials, Planning Commission Members,
    Municipal Staff Members

3
  • WHAT IS TRAFFIC SIGNAL MANAGEMENT?

The use of current tools, techniques and
equipment to manage streets and signal systems
more efficiently and in a cost-effective manner
in order to improve safety, economic vitality and
quality of life.
4
WHAT IS TRAFFIC SIGNAL MANAGEMENT?
  • The 1 investment we can make for immediate
    positive impact.
  • Cost-effective way to improve traffic flow.
  • Maximizes the benefits of the existing
    infrastructure.

5
WHY TRAFFIC SIGNAL MANAGEMENT?
  • 2/3 of all miles driven are on signalized roads
  • Over 300,000 signals in U.S.
  • 75 of the signals could easily be upgraded
  • Congestion affects everyones mobility
  • Adding capacity
  • Expensive
  • Long implementation timeframe
  • Potentially controversial
  • Environmental and social impacts

6
WHY TRAFFIC SIGNAL MANAGEMENT?
Properly designed, operated and maintained
traffic signal systems yield significant benefits
  • Less Congestion
  • Improved Fuel Consumption
  • Vehicle Emissions Reduced
  • Improved Air Quality

7
WHY TRAFFIC SIGNAL MANAGEMENT?
  • Cost effective cost ratios of 401
  • Low-cost alternative to physical reconstruction
  • Arterial management
  • Saves time for commercial vehicles, emergency
    vehicles, buses and the public
  • Reduces aggressive driving behavior, red light
    running

8
WHY TRAFFIC SIGNAL MANAGEMENT?
  • Postpone or eliminate need for additional
    capacity
  • Safety reduce accidents by providing smoother
    traffic flow with fewer stops
  • Maintenance and training streamlined
  • Improved pedestrian flow, side-street movements
  • Municipal cost and energy savings

9
HOW CAN BENEFITS BE ACHIEVED?
10
STRATEGIES
  • Standardization of equipment
  • Remove unwarranted signals
  • Install and maintain equipment properly
  • Traffic signal retiming
  • Implement additional signal plans based on time
    of day/day of week
  • Turn lanes and minor intersection improvements

11
STRATEGIES
  • Traffic Signal Equipment Enhancements
  • Isolated or independent signals
  • Arterial Interconnected Signals
  • Time based coordination
  • Closed Loop Systems
  • Centrally Interconnected Controlled Systems
  • Personal computer (PC) based
  • Traffic Operations Centers

12
Detection Actuation Strategies
  • Fixed Time Operations
  • High traffic and pedestrian volume areas,
  • Not flexible for changing traffic patterns
  • Central Business Districts hours
  • Semi Actuated Operations
  • Applicable to corridors
  • No detectors or actuation on main streets
  • Fully Actuated Operations
  • Most flexible
  • Best for isolated signals

13
GOALS
  • Centralized coordination of signals
  • Coordinate signal operations over jurisdictional
    boundaries
  • Integrate traffic flow over larger areas
  • Corridor Administrator to set up and implement
  • Municipal Training
  • Dedicated funding stream
  • Administrative hierarchy

14
MULTI - MUNICIPAL COOPERATION
  • Procurement Methods
  • Department of General Services (DGS) COSTAR
    program
  • Purchase equipment as public procurement unit
    economies of scale lower costs
  • Cost Sharing concept allows municipalities with
    smaller budgets to benefit too

15
MULTI - MUNICIPAL COOPERATION
  • Equipment better maintained
  • Reduced liability
  • Maintenance streamlined with standardization
  • Funding for larger projects
  • Municipality retains basic timing parameters
  • Costly reconstruction postponed by utilizing
    existing facilities more efficiently
  • Repairs made more quickly

16
Traffic Signal System Improvement Program
  • Traffic Signal Retiming
  • Signal Maintenance Strategies
  • Utilize New Technologies

17
Traffic Signal System Improvement Program
  • Traffic Signal Retiming
  • Interconnect signals
  • Wireless technology
  • Hardwire interconnectivity
  • Coordinate signal controllers
  • Reassign green time
  • General cost range 760 - 2,700 per intersection
  • 20-25 hours per intersection

18
Traffic Signal System Improvement Program
  • Signal Maintenance Strategies
  • Preventive Maintenance
  • Remedial Maintenance
  • Staffing Rules-of Thumb
  • One traffic engineer per 75-100 signals
  • One signal technician per 40-50 signals
  • Consultants often supplement staff
  • Eligible for Federal Aid Funds

19

Traffic Signal System Improvement Program
  • Utilize new technologies
  • ACS Lite (Adaptive Control Software) allows older
    software to communicate
  • Interconnecting signals
  • Spread Spectrum (wireless)
  • Actuating Signals
  • Develop emergency priority corridors
  • Use of LED signal lamps

20
LED SIGNAL LAMPS
  • SAVINGS
  • Signal maintenance costs
  • Energy costs

21
TESTIMONIALS
  • A statewide traffic signal retiming program in
    California found the following benefits
  • 7 reduction in travel time
  • 14 reduction in delay
  • 9 saving in fuel
  • Benefit/cost ratio 581

22
TESTIMONIALS
  • A new signal system and improved signal
    timing conducted in Abilene, Texas (a mid-sized
    urban area) achieved
  • 13 reduction in travel time
  • 37 reduction in delay
  • 6 fuel saving

23
TESTIMONIALS
  • An advanced traffic control system in Oakland
    County, Michigan (a large suburban area)
    achieved
  • 30 reduction in delay
  • 19 increase in peak hour speeds
  • 6 reduction in accidents
  • 33 reduction in stops

24
Route 51 Corridor
25
(No Transcript)
26
SYNCHRO/SIMTRAFFIC MODEL MOEs
27
TRAFFIC SIGNAL OPERATIONS SELF ASSESSMENT TOOL
  • Help agencies understand opportunities
  • for improving their own policies and
  • practices
  • Designed for any agency responsible for operation
    and maintenance of traffic signals
  • One hour to complete
  • No data collection required
  • Results used anonymously in the 2007 National
    Traffic Signal Report Card
  • To use tool http//www.zoomerang.com/recipient/s
    urvey-intro.zgi?pWEB225U6FTB7YM

28
ADDITIONAL RESOURCES
  • FHWA Operations web site http//ops.fhwa.dot.gov
  • Traffic Signal Operation Self Assessment
    www.ite.org/selfassessment
  • MARC Operation Green Light
    www.marc.org/transportation/ogl/
  • ACS Lite Software raj.ghaman_at_fhwa.dot.gov
  • PennDOT http//www.paits.org/tsop/index.htm
  • SPC http//www.spcregion.org/trans.shtml
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