I64 Regional Traffic Management Plan

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I-64 Regional Traffic Management Plan
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Goals and Objectives

• Study Options for Regional Traffic Management
  During Construction Phase
• Select the best alternative(s) or elements of
  alternatives for traffic handling plan
• Plan must support MoDOTs new I-64 project
• Help MoDOTs plan to be successfully completed-on
  time and on budget

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Goals and Objectives

• Regional Problem-Regional Partnership
• Produce a fact-based, comprehensive analysis
  covering all of the options available for traffic
  handling associated with the project
• Recommend (to MoDOT) traffic handling policies
  and goals that represent the best overall value
  to all the citizens of St. Louis County

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Team Structure
Administrative Management Oversight Committee

• 11 member group appointed by County Executive
  representing entire County
• Provide direction to County staff and AMOC during
  the study process
• Review and approve proposed alternative(s)
• Approve final deliverable and make recommendation
  to County Executive

Task Force

• City Managers and Administrators from adjacent
  cities
• Identify issues and propose alternatives
• Analyze in detail the results of alternative
  selection
• Provide feedback to the Task Force

County staff works with both groups to effectuate
a positive outcome!
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Study Deliverable

• Position Paper
• will cover alternatives suggested by the AMOC
• will include sufficient appendices to demonstrate
  the comprehensive nature of the study and support
  the position assumed
• will Summarize Final Recommendations to MoDOT

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Travel Demand Modeling (TDM)
Global Modeling
Regional Modeling
Intersection Level
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Primary Municipal Impact
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Focus Roadways
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East-Bound Traffic
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I-64/40 BRIDGES

• Total number of bridges 29
• North/South Spans 18
• East/West Spans 10
• And I-170 over Galleria Parkway

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What do we want to know?

• Can the bridge be reconstructed in stages?
• How many lanes of traffic will be open during
  each stage?
• Will the North/South bridge staging impact I-64
  construction?
• How many lanes of traffic will be open during
  each stage?

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Alternate 1One Pipeline Lane Open in Each
Direction with NO Access

• PROS
• Attractive to the City of St. Louis and Commuters
  from West St. Louis County and St. Charles County
• Leaves 2 lanes and all access ramps available for
  construction
• Easy to communicate changes to the public
• Faster Construction

• CONS
• Does not serve people with O/D within the study
  area
• Constructability problems in areas of bridges or
  areas where elevation is to be modified
• Problem with Emergency vehicles
• Potential high congestion in case of an accident
  where shoulder is not available
• Higher Rubber-Neck factor and risk for chain
  accidents
• Not friendly to business along the corridor

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Westbound I-64 Lane Closure
Eastbound and Westbound Tube 1 lane in
each direction NO access
Full closure adjacent to construction
Existing I-64
Alternate 1 One Eastbound and One Westbound
Lane in Each Direction Local Traffic Diverted
via Other Local Roads No Interim Access
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Alternate 2Two Lanes Open in Each Direction
with Full Access

• PROS
• Increased Mobility and Accessibility
• Increased Emergency Vehicle Compatibility
• More Options for the traffic to get on/off in
  case of congestion
• Friendly to traffic with O/D within the study
  area
• Better for Business along the corridor

• CONS
• Only inner lanes can be built with no ramps
  closures
• Difficult to communicate changes with the public
• Low Access for construction crew and equipment
• Conflict between construction equipment and
  traffic
• Constructability issues in areas of significant
  grade changes
• Unpredictable open lanes may be stopped on a
  daily basis to get equipment cross the traffic

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Two lanes in each direction with access intact
Road Closure for Construction
Existing I-64
Alternate 2 Two Open Lanes in Each Direction on
Existing I-64 Alignment
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Alternate 3One Direction Open As-Is, One
Direction Closed Completely with NO Access

• PROS
• Only half the traffic will be impacted
• Full access for construction
• Emergency access for the open direction same as
  existing
• Easy to communicate changes to the public
• Satisfies people with O/D within the study area
  and the City of St. Louis equally
• Equal effect on businesses along the corridor

• CONS
• Potential problems with bridges where one bridge
  is shared for both directions
• May cause difficulties when significant changes
  are made to grade on one side with traffic
  flowing in the opposite direction
• Have to re-route the entire traffic of WB or EB
  on local road system which may cause them to be
  one way and inconvenient for residents living in
  the vicinity

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Comparison of Alternatives
I-64
Regional Traffic Management Plan
Alternative 3 is best because less traffic is
diverted to secondary roads!
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Olive Blvd 4 1,200
Olive Blvd 4 1,200
Delmar Blvd 4 600
Forest Pk Pkwy 4 1,300
Ladue Rd 2 800
Forsyth Blvd 2 600
Clayton Rd 4 1,100
Clayton Rd 2 1,100
Manchester Rd
Manchester Rd 4 1,100
Roadway X (laneage) XXX (lane capacity)
Source EWGWCG Note Major collectors in gray
were not considered at this time
Potential Designated Detour Routes

I-64 Regional Traffic Management Plan
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Study Schedule
We are here, doing Alternate 3 micro-analysis!
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What is left to do?

• Detailed Micro simulation Analysis of Alternate
  3 (in phases) in
• Paramics
• Final report