i-75 south managed lanesproject facts the project will add two reversible barrier separated managed...

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

M.

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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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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


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

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Kunst


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

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Kunst


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


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

S.

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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Mohanty

Necessary to maintain continuity of reversible

lane & tolling operation.

Resource Sharing

Shared Microwave Detection System

Existing Navigator Network

Emergency Power System

S.

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


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


3. GDOT opens barrier and warning gates

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GDOT Advanced

Guide Sign

Toll Zone

Status: Active

SRTA Toll Rate

Sign


4. GDOT changes message on Advanced Guide Signs

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GDOT Advanced

Guide Sign

Toll Zone

Status: Active

SRTA Toll Rate

Sign


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 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.

Gille

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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

J.

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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

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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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Gunte

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ACS Cabinet and HMI

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Gunte

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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

B.

Gunte

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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

B.

Gunte

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Passive Control – Thermal Cameras

B.

Gunte

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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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Gunte

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Access Control – Warning Gates

B.

Gunte

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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

B.

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B.

Gunte

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Active Control – Resistance Gate

B.

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Putting It All Together…

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i-75 south managed lanesproject facts the project will add two reversible barrier separated managed...

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