I-75 South Managed LanesWhat’s the Toll for a Hoverboard?
Session 5
I-75 South Metro
September 29, 2015
Presenters
Moderator: Mark Demidovich, GDOT
Panel:
Darryl VanMeter, GDOT
Keith Kunst, Arcadis
Shubendu Mohanty, Arcadis
Annie Gillespie, SRTA
Jennifer Tsien, Atkins
Bill Gunter, BBH
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I-75 South Managed LanesProject History and Background
Darryl VanMeter
I-75 South Metro
September 29, 2015
Overall Express Lanes Network
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Conceptual Overview
I-75 Express Lanes is identified as a Tier 1 recommendation in the Managed Lane System Plan, adopted by the State Transportation Board in December 2009.
From the MLSP GDOT recognized that: Managed lanes would be defined as a set of lanes where operational
strategies are proactively implemented and managed in response to changing conditions.
Managed lanes are considered to be complementary treatments to metro Atlanta’s interstate network
Managed lane solutions would preserve mobility choices and likely represent the most appropriate and cost beneficial improvements.
Transportation needs have outpaced traditional revenue sources
In some locations it is not feasible to build all the additional lanes necessary to meet current and future needs.
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Why Is This Project Important?
I-75 is an important local and regional corridor
One of the nation’s most traveled highways, especially in metro Atlanta
Primary connection between jobs and fast-growing Henry County
Safety, travel demand, regional growth and accessibility are major issues
Transportation investments are the solution Improve roadway capacity, accessibility, efficiency
Address safety -- increased traffic congestion increases crash frequency
Context of Traffic volumes between SR 155 and I-75/675 lends credible opportunity for a ML solution
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Project Facts
The project will add two reversible barrier separated managed lane system along I‐75 in Henry and Clayton Counties from SR 155 to SR 138 for 12.24 miles.
The express lanes are designed to improve the flow of traffic, increase travel options for motorists, transit and registered vanpool customers, provide reliable trip times, create jobs and bring economic benefits to the residents of this region.
The project funding sources: state-motor fuel, federal aid and toll revenue bonds.
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Project Facts
Express Toll Lanes (ETL) is the selected tolling alternative.
The project will add two reversible barrier separated managed lane system along I‐75 in Henry and Clayton Counties from SR 155 to SR 138 for 12.24 miles.
The express lanes are designed to improve the flow of traffic, increase travel options for motorists, transit and registered vanpool customers, provide reliable trip times, create jobs and bring economic benefits to the residents of this region.
Total Project Phase: $226 Million.
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Project Schedule
Decision on Reversible System (2010)
Draft RFP – January 18, 2013
RFP – March 22, 2013
DB Letting – June 22, 2013
EA/FONSI Approval – June 28, 2013
Award – July 5, 2013
Groundbreaking - October 6, 2014
Open to Tolling – Early 2017
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RACS Integration Org Chart
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I-75 South Metro
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Construction Progress
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Construction Progress
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I-75 South Managed LanesDesign-Build Challenges
Keith Kunst
I-75 South Metro
September 29, 2015
Project Team/ D-B Effort
Contracting Team
Prime Contractor - CW Matthews Contracting Company
ITS and Tolling Subcontractor – Brooks Berry Haynie
Design Team
Prime Design Engineer ARCADIS – 85% of the Design including 100% all ITS and Electrical Design
Highway Lighting Subconsultant – Atlanta Consulting Engineers
K.
Kunst
Roadway Design Aspects of Toll Facilities
Basic Elements Reversible System
Barrier Separated System with Access Control Gates
I-75 Southbound shifted out to Create Space for Express Lanes
70 mph Design Speed for Express Lanes, 55 mph for Slip Ramps
K.
Kunst
Roadway Design Aspects of Toll Facilities
Toll Plaza Design Restrictions
Profile Restrictions at Toll Zones (0.5% revised to 1%)
Highway Lighting throughout toll zones
Lane and Shoulder Width Considerations
Drainage and Metal Restrictions
K.
Kunst
Roadway Design Aspects of Toll Facilities
cont’d…
Access Point Design Shifts Interstate Mainline to create access points Distinct Divergences for Exits Proper entrance ramp tapers, gores, visibility Distinct wrong way at entrances/exits Coordinate design with gates
K.
Kunst
Roadway Design Aspects of Toll Facilities
cont’d…
Accommodating Access Control System Access Control Gate Sequencing
- Series of warning gates- Resistance gate to prevent
wrong way movements Gate Heights and Mounting
Accommodations- Warning gate arms need to be
between 2’-6” and 3’-6”- Gate positions need to account
for cross slopes- Side barriers transitioned in
width for structural mounting
K.
Kunst
Roadway Design Aspects of Toll Facilities
cont’d…
Locating Generator/ Tolling Maintenance Sites Specialized Site Design
Facilitate SRTA Access
Incorporate Utilities
Special Access Point -
I-75 at I-675 Split
Special Access Point -
Jonesboro Road Access Drop Ramp
K.
Kunst
I-75 South Managed LanesITS Design
Shubhendu Mohanty
I-75 South Metro
September 29, 2015
Role of ITS
Traffic Management Tolling System Management
Tolling System
Operation
General Purpose
Operation
Reversible Express
Lane Operation
S.
Mohanty
ITS Components
General Purpose
OperationTolling System Operation
Reversible Express Lane
Operation
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Mohanty
Network Topology
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HUB-CC
HUB-BB
SRTA Tolling System Network
HUB-U
GDOT Navigator Network
Legend
ACS
#1ACS
#6
ACS
#5
ACS
#7
ACS
#3
ACS
#4
Reversible Access Control System (ACS)
ACS
#2
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Mohanty
Project consist of multiple ITS networks.
Reversible Access Control System
Access Control
Signalized Int.
Ramp Access
Signs
Status
Beacon Warning
Gates
Resistance
Gate
ACCESS
CONTROL
SYSTEM
Toll Rate Signs
Access Control
Signs
Travel Time
Information Signs
S.
Mohanty
What are the components of a typical Access
Control System?
Emergency Generator Power
Reversible Express Lane
Operation Tolling SystemITS Backbone
Infrastructure
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Jodeco R
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Mohanty
Necessary to maintain continuity of reversible
lane & tolling operation.
Resource Sharing
Shared Microwave Detection System
Existing Navigator Network
Emergency Power System
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Mohanty
Resource Sharing Between GDOT & SRTADuctbank System
Design Initiatives
Comprehensive Design
of Electrical System
CCTV Line-of-Sight Verification
Device NomenclatureDetailed Toll Site Plan
S.
Mohanty
Initiatives to address design challenges.
I-75 South Managed LanesReversal Operations and Redundancy
Annie Gillespie
I-75 South Metro
September 29, 2015
Reversing I-75 South
Typically two reversals per day
Mid-day reversal for outbound evening commute
Late-night reversal for the inbound morning commute
HERO units will be on-site during all reversals
Two dedicated units required for reversal
Check that the gates open/close properly at every entry and exit point
Can access the ACS cabinet to start/continue the reversal (if reversal fails
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Access Points
Reversals are completed by Access Point
Each Access Point contains equipment for both entrances and exits
Gates
Signs
Toll points
Signals/Blank-out Signs
Order of operations is pre-determined, site-specific, and operation specific
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Example of Slip Ramp Opening
1. GDOT runs camera sweep of entire corridor – looking for debris and stalled vehicles that may be blocking the managed lanes prior to reversal
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GDOT Advanced
Guide Sign
Toll Zone
Status: Inactive
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
2. GDOT sends command to SRTA that the managed lanes are ready to open/reverse –Toll Zone set to expect vehicles
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GDOT Advanced
Guide Sign
Toll Zone
Status: Active
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
3. GDOT opens barrier and warning gates
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GDOT Advanced
Guide Sign
Toll Zone
Status: Active
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
3. GDOT opens barrier and warning gates
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GDOT Advanced
Guide Sign
Toll Zone
Status: Active
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
3. GDOT opens barrier and warning gates
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GDOT Advanced
Guide Sign
Toll Zone
Status: Active
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
3. GDOT opens barrier and warning gates
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GDOT Advanced
Guide Sign
Toll Zone
Status: Active
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
4. GDOT changes message on Advanced Guide Signs
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GDOT Advanced
Guide Sign
Toll Zone
Status: Active
SRTA Toll Rate
Sign
Example of Slip Ramp Opening
5. GDOT sends command to SRTA to change the message on Toll Rate Sign
– Toll Rate Sign displays a rate; Access point open to traffic A.
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Toll Zone
Status: Active
SRTA Toll Rate
Sign
GDOT Advanced
Guide Sign
75 South Northbound Operation
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75 South NB to SB Reversal
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75 South NB to SB Reversal
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75 South NB to SB Reversal
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75 South NB to SB Reversal
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75 South Southbound Operation
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Physical Redundancy
Power
Permanent, natural gas generators
Mobile, trailer-mounted generator
All Access Control Devices have battery backup
Communication
Ring of fiber along the main corridor
Redundant pathways to the TMC and SRTA HQ
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Operational Redundancy
Active-Active Hub Failover
SRTA will have a complete system in each hub
If one hub fails, will automatically failover to second hub
Traffic Management Center
All managed lanes will operate out of TMC (both GDOT and SRTA)
Generator backup
Both GDOT and SRTA have Disaster Recovery Facilities
A.
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I-75 South Managed LanesElectronic Tolling – Comparison of I-85
Express and I-75 South
Jennifer Tsien
I-75 South Metro
September 29, 2015
Roadside Equipment
• In-vehicle transponders and/or license plate tolling
• In-lane equipment
• Antennas and readers
• Violation enforcement system including triggers
• Lighting
• Audit Cameras
• Lane Controllers on a LAN
• Roadside Equipment
• Traffic Cameras
• Traffic Sensors
• Toll Rate signs/cameras
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Gantry-Mounted Antenna
Inductance
Loop Detector
VES Camera
Roadside Equipment – I-85 Express Lanes
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VES
Camera
Gantry Mounted
Antenna
Inductance
Loop Detector
RTMS Device
Roadside Equipment – I-75 South
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Reversible Gantry
Roadside Equipment - Comparison
I-85 Express
67 total gantries NB and SB
Gantries are located in ½ mile increments
I-75 South
75S - 7 total toll zones NB and SB
Toll zones are located at each entry and exit
Each toll zone has 2 full span gantries
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Trip Building Overview
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Collect Transactions at Gantries
Pair/Combine Transactions into Trips
Rate Based on Trip Origin and Destination
Send to Back Office for Posting
Trip Building by Project
I-85 Express
Trip may include a single tolling segment or multiple tolling segments
A minimum of two gantry reads per segment are necessary to form a valid trip
Minimum number of reads to form shortest trip is two
Maximum number of reads to form longest trip is 34
I-75 South
No concept of a tolling Segment
Entry/exit transactions are used to create trips
Two gantry reads are required to form shortest trip and longest trip
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Toll Operations
• Host that can be located on project or remotely
• Stores images, video, transactions, traffic data
• Calculates toll rates and posts to signs
• Builds trips and assigns rates
• Back Office• Account management
• Violations processing
• Customer Service Center
• Image review
• Toll Operation Center
• Manage toll rates
• Monitor traffic incidents and coordinate with GDOT Traffic Management Center (TMC)
• Monitor tolling equipment
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Toll Pricing – I-85 Express
• Static, variable, or dynamic
• I-85 Express Lanes are a combination of all of the above
• Minimum rate per mile $0.01, Maximum rate per mile $0.90
• Dynamic tolls are calculated using live traffic speeds and volumes from both the EL and the GP lane
• Trip rate is calculated per mile, locked in at point of entry.
• Signage is based upon next/last destination
• Designated weave areas for ingress/egress.
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Toll Pricing – I-75 South
• Static, variable, or dynamic
• I-75 South Express Lanes can be a combination of the above
• Minimum – Flat $0.50, Maximum rate per mile is $0.90
• Dynamic tolls are calculated using live traffic speeds and volumes from both the EL and the GP lane
• Trip rate is segment based, locked in at point of entry
• Signage is based upon next/last destination
• Ingress/Egress via dedicated slip ramps along mainline and arterial access ramps
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I-75 South Managed LanesBuilding a Reversible Lane - Access
Control System
Bill Gunter
I-75 South Metro
September 29, 2015
Three Main ACS Components
The System Control cabinet and components
Interlocks and overrides
Passive Controls Changeable Message Signs (CMS)
Conventional / Thermal cameras
Active Controls Warning Gates
Resistance Gates
B.
Gunte
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System Component Highlights
System designed and built by
Cameleon sever and client software
Redundant server architecture
Interlocks and lane control sequencing
ACS cabinets and local controls
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ACS Cabinet and HMI
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Chameleon Software
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Chameleon Software
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Chameleon Software
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Passive Control - CMS
CMS’ alert motorists of lane status and pricing
Two types: inserts and walk-in
Full color, full matrix
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CMS Bricks
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Full Matrix CMS
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Passive Control – Thermal Cameras
Conventional and Thermal cameras for lane monitoring
Infrared (IR) Thermal Imaging Cameras
Day or night, rain or shine
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Passive Control – Thermal Cameras
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Active Control – Warning Gates
Horizontal-swing gates
Provide active warning to motorists not to enter lane.
Open and close in sequence
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Access Control – Warning Gates
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Active Control – Resistance Gate
Vertical-swing gates
Lock into barrier wall
Prevent vehicles from entering a closed lane
Open and close in sequence with warning gates
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Active Control – Resistance Gate
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Putting It All Together…
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