Traffic Modeling and Coding at the Atlanta Regional Commission AMPO Modeling Meeting, Kansas City Monday September 27, 2004 by Guy Rousseau Atlanta Regional Commission

1
Traffic Modeling and Coding at the Atlanta
Regional CommissionAMPO Modeling Meeting,
Kansas CityMonday September 27, 2004byGuy
RousseauAtlanta Regional Commission
2
What is the ARC Modeling Domain?

• 10-county ARC planning area
• 19 counties containing a portion of 2000 Atlanta
  UAB (ARC will likely expand to 18 counties)
• 13 counties classified as Serious ozone
  nonattainment area by 1990 CAAA (reclassification
  to Severe effective January 2004)
• 20 counties proposed for 8-hour nonattainment area

3
Number One Challenge - Growth
7.0
6.0
6.0
5.1
5.0
4.2
3.7
4.0
MILLIONS
4.2
2.7
3.0
3.6
2.0
3.0
2.0
2.5
1.8
1.0
1.2
0.0
1980
1990
2000
2010
2020
2030
(13 County Non-attainment Area)
Population
Employment
4
What does this mean?
2.3 million people is equivalent to adding the
metro area of
One (1) Portland
OR
Two (2) Jacksonvilles
OR
Four (4) Chattanoogas
5
ATLANTA REGION ENHANCED TRAVEL DEMAND MODEL TRIP
GENERATION THROUGH MODE CHOICE
TRANPLAN
BUILD FARE MATRIX
Station To Zone Equivalency File
Off-Peak Highway Link Data File
Peak Highway Link Data File
Zone Boundary File
Transit Peak Link File
Transit Node File
Highway Node File
Highway Node File
Off-Peak Transit Link Data File
TRANPLAN
Peak Transit Link Data File
Transit Node File
Transit Node File
Fare Table Adjusted For Trips Originating In Cobb
County Not Destinated To MARTA Station
Transit Fare Matrix
Transit Fare Matrix
MATRIX UPDATE
TRANPLAN
FORTRAN Program
TRANPLAN
TRANPLAN
MATRIX MANIPULATE
TRANPLAN
TRANPLAN
BUILD HIGHWAY NETWORK
BUILD HIGHWAY NETWORK
BUILD TRANSIT NETWORK
ATTRNWLK.EXE
BUILD TRANSIT NETWORK
Four Fare Tables By Mode
Transit Fare Matrix
Table 1 - Local Bus Fare Tasble
Table 2 - Rail Fare Table
Peak Highway Network File
Off-Peak Highway Network File
Off-Peak Transit Network File
Table 3 - Blank
Peak Transit Network File
Zone Boundary File
Table 4 - Commuter Raril Fare Table
Highway Node File
Walk Time/ Walk Station File (Peak )
Walk Percent File (Peak )
Report File
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
FORTRAN Program
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
HIGHWAY SELECTED SUMMATION
BUILD TRANSIT PATHS
BUILD TRANSIT PATHS
BUILD TRANSIT PATHS
BUILD TRANSIT PATHS
BUILD TRANSIT PATHS
BUILD TRANSIT PATHS
ATLANDFM.EXE
Three Peak Skim Tables Drive Alone No Toll
Three Peak Skim Tables Drive Alone Toll
Three Peak Skim Tables 2 Person HOV No Toll
Three Peak Skim Tables 2 Person HOV Toll
Three Peak Skim Tables 3 Person HOV No Toll
Three Peak Skim Tables 3 Person HOV Toll
Three Off-Peak Skim Tables Drive Alone No Toll
Three Off-Peak Skim Tables Drive Alone Toll
Three Off-Peak Skim Tables 2 Person HOV No Toll
Three Off-Peak Skim Tables 2 Person HOV Toll
Three Off-Peak Skim Tables 3 Person HOV No Toll
Three Off-Peak Skim Tables 3 Person HOV Toll
Peak Highway Skim Tables
Peak Highway Skim Tables
Peak Highway Skim Tables
Peak Highway Skim Tables
Peak Highway Skim Tables
Peak Highway Skim Tables
Off Peak Highway Skim Tables
Off Peak Highway Skim Tables
Off Peak Highway Skim Tables
Off Peak Highway Skim Tables
Off Peak Highway Skim Tables
Off Peak Highway Skim Tables
Peak Walk Access To Local Transit Paths
Peak Drive Access To Local Transit Paths
Peak Premium Transit Paths
Off-Peak Walk Access To Local Transit Paths
Off-Peak Drive Access To Local Transit Paths
Off-Peak Premium Transit Paths
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Land Form Data File
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Highway Terminal Time File
Highway Terminal Time File
Highway Terminal Time File
Highway Terminal Time File
Highway Terminal Time File
Highway Terminal Time File
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANSIT SELECTED SUMMATION
TRANSIT SELECTED SUMMATION
TRANSIT SELECTED SUMMATION
TRANSIT SELECTED SUMMATION
TRANSIT SELECTED SUMMATION
TRANSIT SELECTED SUMMATION
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
MATRIX UPDATE
Six Peak Skim Tables
Seven Peak Skim Tables
Eight Peak Skim Tables
Six Off-Peak Skim Tables
Seven Off-Peak Skim Tables
Eight Off-Peak Skim Tables
Table 1 - Local Bus Time
Table 1 - Local Bus Time
Table 1 - Local Bus Time
Table 1 - Total Walk Time
Table 1 - Local Bus Time
Table 1 - Total Walk Time
Peak Walk Access To Local Transit Skims
Peak Drive Access To Local Transit Skims
Peak Premium Transit Skims
Off-Peak Walk Access To Local Transit Skims
Off-Peak Drive Access To Local Transit Skims
Off-Peak Premium Transit Skims
Table 2 - Express Bus Time
Table 2 - Express Bus Time
Table 2 - First Wait Time
Table 2 - Express Bus Time
Table 2 - Express Bus Time
Table 2 - First Wait Time
Table 3 - First Wait Time
Table 3 - First Wait Time
Table 3 - Seond Wait Time
Table 3 - First Wait Time
Table 3 - First Wait Time
Table 3 - Seond Wait Time
Three Off-Peak Skim Tables Drive Alone No Toll
Three Off-Peak Skim Tables Drive Alone Toll
Three Off-Peak Skim Tables 2 Person HOV No Toll
Three Off-Peak Skim Tables 2 Person HOV Toll
Three Peak Skim Tables 2 Person HOV No Toll
Three Peak Skim Tables 2 Person HOV Toll
Three Peak Skim Tables 3 Person HOV No Toll
Three Peak Skim Tables 3 Person HOV Toll
Three Off-Peak Skim Tables 3 Person HOV No Toll
Three Off-Peak Skim Tables 3 Person HOV Toll
Table 4 - Total Walk Time
Table 4 - Total Walk Time
Table 4 - Local Bus In-Vehicle Time
Table 4 - Total Walk Time
Table 4 - Local Bus In-Vehicle Time
Three Peak Skim Tables Drive Alone No Toll
Three Peak Skim Tables Drive Alone Toll
Table 4 - Total Walk Time
Pk Hwy Skim Times With Terminal Times
Pk Hwy Skim Times With Terminal Times
Pk Hwy Skim Times With Terminal Times
Pk Hwy Skim Times With Terminal Times
Pk Hwy Skim Times With Terminal Times
Pk Hwy Skim Times With Terminal Times
Off-Pk Hwy Skim Times With Terminal Times
Off-Pk Hwy Skim Times With Terminal Times
Off-Pk Hwy Skim Times With Terminal Times
Off-Pk Hwy Skim Times With Terminal Times
Off-Pk Hwy Skim Times With Terminal Times
Off-Pk Hwy Skim Times With Terminal Times
Table 5 - Second Wait Time
Table 5 - Second Wait Time
Table 5 - Second Wait Time
Table 5 - MARTA Time
Table 5 - Second Wait Time
Table 5 - MARTA Time
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 1 - Cost Skim Table
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 6 - Number of Transfers
Table 6 - Number of Transfers
Table 6 - Express Bus Time
Table 6 - Number of Transfers
Table 6 - Number of Transfers
Table 6 - Express Bus Time
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 2 - Distance Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 7 - Drive Access Time
Table 7 - CommuterRail Time
Table 7 - Drive Access Time
Table 7 - CommuterRail Time
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 3 - Time Skim
Table 8 - Number of Transfers
Table 8 - Number of Transfers
TRANPLAN
TRANPLAN
Station To Zone Equivalency File
TRANPLAN
TRANPLAN
Zone Boundary File
Transit Off-Peak Link File
Transit Node File
MATRIX MANIPULATE
MATRIX MANIPULATE
MATRIX MANIPULATE
MATRIX MANIPULATE
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
MATRIX MANIPULATE
MATRIX MANIPULATE
MATRIX MANIPULATE
MATRIX MANIPULATE
MATRIX MANIPULATE
MATRIX MANIPULATE
Two Off-Peak Skim Tables
Three Off-Peak Skim Tables
Two Off-Peak Skim Tables
Three Peak Skim Tables
Off- Peak Walk To Transit Accessibility Skims
Off-Peak Drive To Transit Accessibility Skims
Peak Walk To Transit Accessibility Skims
Table 1 - Total Out of Vehicle Time
Table 1 - Total Out of Vehicle Time
Table 1 - Total Out of Vehicle Time
Peak Drive To Transit Accessibility Skims
Table 1 - Total Out of Vehicle Time
Table 2 - Total Walk Time
Table 2 - Total In-Vehicle Time
Table 2 - Total In Vehicle Time
Table 2 - Total In-Vehicle Time
Five Peak Skim Tables Drive Alone
Five Peak Skim Tables 2 Person HOV
Five Peak Skim Tables 3 Person HOV
Five Off-Peak Skim Tables Drive Alone
Five Off-Peak Skim Tables 2 Person HOV
Five Off-Peak Skim Tables 3 Person HOV
Table 3 - Total Drive Time
Table 3 - Total Drive Time
Pk Hwy Skim Times For Mode Choice Input
Pk Hwy Skim Times For Mode Choice Input
Pk Hwy Skim Times For Mode Choice Input
Off-Pk Hwy Skim Times For Mode Choice Input
Off-Pk Hwy Skim Times For Mode Choice Input
Off-Pk Hwy Skim Times For Mode Choice Input
FORTRAN Program
Table 1 - Drive Time Without Toll
Table 1 - Drive Time Without Toll
Table 1 - Drive Time Without Toll
Table 1 - Drive Time Without Toll
Table 1 - Drive Time Without Toll
Table 1 - Drive Time Without Toll
Table 2 - Drive Distance Without Toll
Table 2 - Drive Distance Without Toll
Table 2 - Drive Distance Without Toll
Table 2 - Drive Distance Without Toll
Table 2 - Drive Distance Without Toll
Table 2 - Drive Distance Without Toll
Table 3 - Drive Time With Toll
Table 3 - Drive Time With Toll
Table 3 - Drive Time With Toll
Table 3 - Drive Time With Toll
ATTRNWLK.EXE
Table 3 - Drive Time With Toll
Table 3 - Drive Time With Toll
Table 4 - Drive Distance With Toll
Table 4 - Drive Distance With Toll
Table 4 - Drive Distance With Toll
Table 4 - Drive Distance With Toll
Table 4 - Drive Distance With Toll
Table 4 - Drive Distance With Toll
Table 5 - Toll
Table 5 - Toll
Table 5 - Toll
Table 5 - Toll
Table 5 - Toll
Table 5 - Toll
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
MATRIX TRANSPOSE
MATRIX TRANSPOSE
MATRIX TRANSPOSE
MATRIX TRANSPOSE
Land Use Data File
Station Data File
Walk Time/ Walk Station File (Off-Peak)
Walk Percent File (Off-Peak)
Report File
FORTRAN Program
Zone Level Parking Cost File
Two Off-Peak Skim Tables
Three Off-Peak Skim Tables
Two Off-Peak Skim Tables
Three Off-Peak Skim Tables
ATPRKEST.EXE
Off-Peak Walk To Transit Accessibility Skims
(Transposed)
Table 1 - Total Out of Vehicle Time
Off-Peak Drive To Transit Accessibility
Skims (Transposed)
Table 1 - Total Out of Vehicle Time
Peak Walk To Transit Accessibility Skims
(Transposed)
Table 1 - Total Out of Vehicle Time
Peak Drive To Transit Accessibility
Skims (Transposed)
Table 1 - Total Out of Vehicle Time
Zone Area and Location Data File
Table 2 - Total Walk Time
Table 2 - Total In-Vehicle Time
Table 2 - Total Walk Time
Table 2 - Total In-Vehicle Time
Table 3 - Total Drive Time
Table 3 - Total Drive Time
FORTRAN Program
Mode Choice Coefficient File
ARCMC.EXE
Land Use Data File
Highway Node File
FORTRAN Program
Work Componsite Impedence File
FORTRAN Program
ATNWKIMP.EXE
FORTRAN Program
ATWRKINT.EXE
ATACC1.EXE
Nonwork Componsite Impedence File With Intrazonal
Zone SocioeconomicData
Nonwork Componsite Impedence File
Households By Size and Income
TRANPLAN
Highway Node File
Updated Work Componsite Impedence File
BUILD INTRAZONAL IMPEDANCES
Distance Accessibility File
Walk Accessibility File (Optional)
Household Distance Accessibility File (Optional)
Employee Distance Accessibility File (Optional)
Employee Transit Accessibility File (Optional)
Zone Accessibility File
Zone SocioeconomicData
Households By Size and Income
FORTRAN Program
FORTRAN Program
Households By Size, Income and Vehicles Available
Transit Accessibility File
.EXE
ATTGEN2.EXE (Stage 1)
ATACC2.EXE
NHB Friction Factor File
Walk Accessibility File
FORTRAN Program
ATTGEN2.EXE (Stage 2)
TRANPLAN
GRAVITY MODEL
HBW Productitons and Attractions (By 0, 1, 2,
3 Autos)
HBO Productitons and Attractions (By 0, 1, 2,
3 Autos)
HBU Productitons and Attractions
HBO Friction Factor File (By 0, 1, 2, 3 Autos)
HBGD Productitons and Attractions
NHBJTW Productitons and Attractions
NHBJAW Productitons and Attractions
NHB Productitons and Attractions
NHBJTW Friction Factor File
NHBJAW Friction Factor File
NHB Friction Factor File
HBGD Friction Factor File
HBU Friction Factor File
HBW Person Trip Table 0 Autos
HBW Person Trip Table 1 Auto
HBW Person Trip Table 2 Auto
HBW Person Trip Table 3 Auto
Merged HBW Person Trip Tables (0, 1 2, 3 Auto)
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
TRANPLAN
Develop FRATAR Factors
MATRIX MANIPULATE
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
GRAVITY MODEL
HBO Person Trip Tables (0, 1, 2, 3 Auto)
HBU Person Trip Tables
NHBJTW Person Trip Tables
NHBJAT Person Trip Tables
NHB Person Trip Tables
Station Data File
Station Data File
FORTRAN Program
Mode Choice Coefficient File
ARCMC.EXE
Mode Choice Coefficient File
FORTRAN Program
FORTRAN Program
FORTRAN Program
FORTRAN Program
FORTRAN Program
ARCMC.EXE
ARCMC.EXE
ARCMC.EXE
ARCMC.EXE
ARCMC.EXE
Highway Trip Tables
Zonal Transit Trip Tables
Station Transit Trip Tables
Table 1 - Drive Alone Free
Table 1 - Walk to Local Express Bus (1)
Table 1 - Feeder Bus to Premium (1)
HBW Highway Trip Tables
HBW Transit Trip Tables
HBW Station Transit Trip Tables
Table 2 - Drive Alone Toll
Table 2 - Informal Drive to Local Express Bus
(1)
Table 2 - Park Ride to Premium (1)
Table 3 - 2 Person HOV Free
Table 3 - Fromal Drive to Local Express Bus (1)
Table 3 - Kiss Ride to Premium (1)
Table 4 - 2 Person HOV Toll
Table 4 - Total Local Express Bus (1)
Table 4 - Walk to Premium (1)
Table 5 - 3 Person HOV Free
Table 5 - Rail Trips (1)
Highway Trip Tables
Zonal Transit Trip Tables
Station Transit Trip Tables
Table 5 - Feeder Bus From Station (2)
SAME 9 TABLES AS NHB
Table 6 - 3 Person HOV Toll
Table 6 - Commuter Rail Trips (1)
Table 6 - Walk from Station (2)
HBO Highway Trip Tables
HBO Transit Trip Tables
HBO Station Transit Trip Tables
SAME 14 TABLES AS NHB
SAME 6 TABLES AS NHB
Highway Trip Tables
Zonal Transit Trip Tables
Station Transit Trip Tables
Highway Trip Tables
Zonal Transit Trip Tables
Station Transit Trip Tables
Table 7 - Blank
Table 7 - Total Transit Trips (1)
Notes (1) - Station to Station Trips
SAME 14 TABLES AS NHB
SAME 9 TABLES AS NHB
SAME 14 TABLES AS NHB
SAME 9 TABLES AS NHB
(2) - Station to Zone Trips
Table 8 - Blank
Table 8 - Blank
NHBJTW Highway Trip Tables
NHBJTW Transit Trip Tables
NHBJTW Station Transit Trip Tables
SAME 6 TABLES AS NHB
NHB Highway Trip Tables
NHB Transit Trip Tables
NHB Station Transit Trip Tables
SAME 6 TABLES AS NHB
1990 Grade School Auto Driver Trip Table
1990 Grade School Transit Passenger Trip Table
Table 9 - Blank
Table 9 - Feeder Bus to Rail (2)
Table 10- Park Ride to Rail (2)
Table 11- Kiss Ride to Rail (2)
Table 12 - Feeder Buse to CommuterRail (2)
Table 13 - Park Ride to CommuterRail (2)
TRANPLAN
Table 14 - Kiss Ride to CommuterRail (2)
Notes (1) - Zone to Zone Trips
(2) - Zone to Station Trips
FRATAR
Highway Trip Tables
Zonal Transit Trip Tables
Station Transit Trip Tables
Highway Trip Tables
Zonal Transit Trip Tables
Station Transit Trip Tables
HBU Highway Trip Tables
HBU Station Transit Trip Tables
SAME 9 TABLES AS NHB
SAME 14 TABLES AS NHB
SAME 9 TABLES AS NHB
Grade School Auto Driver Trip Table
Grade School Transit Passenger Trip Table
HBU Transit Trip Tables
SAME 14 TABLES AS NHB
SAME 6 TABLES AS NHB
NHBJAW Highway Trip Tables
NHBJAW Transit Trip Tables
NHBJAW Station Transit Trip Tables
SAME 6 TABLES AS NHB
6
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7

• ARC Highway Networks Related TAZ Geometrics
• Expanded Zonal Structure from 948 internal TAZ to
  1683, maintained External Stations to 57 zones,
  for a grand total of 1740 TAZ, compared to 1005
  previously
• QA/QC 2000 Base Year Highway Network using GIS-T
  techniques and Aerial Photography
• Revisited Centroid Connectors to accommodate new
  internal TAZ geometric reconfiguration
• Refined Facility Types Definitions using ARC CMS
  Strategic Arterial System Definitions
• Updated Free-Flow Speeds and Capacities Look-Up
  Tables, based upon 2000-2001 travel times and
  speed studies

8
Principles of ARC Highway Network
Coding Difference between the real-world
curvilinear shape of roads/streets, such as from
GDOTs DLGF (Digital Linear Graphic Format) and
a stick highway network coded in TP / Viper
.
.
.
B
.
B
A
A
TP Network
DLGF Network
9
ARC 57 External Stations
10
ARC Facility Types

• 0 Centroid Connectors
• 1 Interstate / Freeway
• 2 Parkway
• 3 HOV Buffer Separated
• 4 HOV Barrier Separated
• 5 High Speed Ramp / Collector Distributor Road
• 6 Medium Speed Ramp
• 7 Low Speed Ramp
• 8 Loop Ramp
• 9 Off Ramp w/ Intersection
• 10 On Ramp w/ Intersection
• 11 Expressway
• 12 Principal Arterial - Class I
• 13 Principal Arterial - Class II
• 14 Minor Arterial - Class I
• 15 Minor Arterial - Class II
• 16 HOV - Arterial (all classes)
• 17 Major Collector
• 18 Minor Collector / Other Local

11
Interchange Coding
12
Interchange Coding, Another Example
13
Collector Distributor Roadway

• A one-way road parallel to the main traffic lanes
  
• Provides access to / from more than one ramp
• Collects traffic from on-ramps or the main lanes
• Distributes traffic to off-ramps or back to the
  main lanes
• Minimizes interactions with thru traffic
• Serves closely spaced interchanges.

14
Interchange Coding, CD
15
Braided Ramps

• Used where hypothetically 2 nearly parallel ramps
  must cross each other and use a grade separation
  to avoid weaving
• Where the on-ramp from one nearby interchange is
  braided to avoid interfering with the off-ramp
  for the next one
• Eliminates non-acceptable weaves
• Are structures designed to separate traffic using
  the same stretch of road for competing purposes
• Alleviates competition between cars trying to
  enter and exit by separating each movement to a
  different roadway (i.e. split diamond with
  braids).

16
Interchange Coding, braided ramps
17
Transition Tapers, Auxiliary Lanes, Acceleration
and Deceleration Lanes

• These are perceived as pavement transitions.
• Transitions for lane additions, either for left
  or right turns or to add a lane to a ramp, should
  occur over a length of at least ¼ mile (1,320
  feet) in order to warrant detailed coding
  attention from the ARC
• Could be considered adding capacity, depending
  upon length.

18
Log Files forNetwork Coding Management

• Record activity in an ASCII text file which is
  then saved and played later on networks.
• Because they are based upon the base network,
  logs contain same data fields and restrictions as
  the network itself.
• Each highway project has its own log file, hence
  facilitating coding efforts and management of
  scenarios

19
Spaghetti Junction (I-85 _at_ I-285)
20
Spaghetti Junction (I-85 _at_ I-285)
21
Atlantic Steel Site Development
22
Atlantic Steel Site
23
Northside Drive _at_ I-75
24
Northside Drive _at_ I-75
25
Bouldercrest Road _at_ I-285
26
Bouldercrest Road _at_ I-285
27
Downtown Connector (I-75 / I-85) _at_ I-20
28
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29

• ARC-Coded ITS Strategies for Future Network Years
  (2030)
• Advanced Traffic Signal Coordination and Control
• Fiber-optic Communications
• Video Surveillance and Data Collection on Entire
  Corridors
• Activity Center Surveillance at Interstate
  Highway Crossings, Industrial Yards, Shopping
  Malls, Cross Regional Corridors
• Facilities Parallel to Interstate Highways
• Variable Message Signs (VMS) at Major Decision
  Points on Freeways
• Transit Vehicle Signal Priority
• Automated Vehicle Location (AVL) for Transit
• Electronic Fare Payment for Transit Service
• Queue Jumper Lanes for Transit
• Ramp Metering on Freeways
• ITS benefits expressed in terms of
• travel time savings
• delay reductions
• free-flow speeds increases
• localized transit mode share increases

30

• Highway ITS Strategies for Coding Future Network
  Years (2030), not used for air quality conformity
  determination, just a test for aspiration plan,
  not the constrained plan
• Highway Capacity Improvement
• Add Variable to Coded Highway Network
• Freeway capacity 1.08 (6 increase for
  surveillance detection, 2 increase for dynamic
  message signs)
• Arterial capacity 1.03 (3 increase for
  surveillance detection)

31

• Highway Speed Improvement
• Signal system benefits only for arterials
  collectors.
• Benefits apply to all ITS packages, level of
  benefit dependant upon area type with higher
  densities receiving greater benefits.)
• CBD speed 1.08
• High Density Urban speed 1.07
• Medium Density Urban speed 1.06
• Medium Density Suburban speed 1.05
• Low Density Suburban speed 1.04
• Exurban speed 1.03
• Rural speed 1.02

32

• ARCs Transit Network Coding
• Developed a Bus Speed Model
• Empirical model to hook bus speeds with congested
  highway travel times, reflecting mixed flow of
  traffic operating conditions
• Defined 3 types of transit service access
• Walk to local bus service
• Walk to premium (with local bus rail)
• Drive to transit
• Separated walk to local from walk to premium
• Automated procedures for walk-to-transit links,
  with maximum length based on area of zone
• Separated Park-And-Ride (PNR) lots by types,
  local VS premium
• Local, max access time 15 minutes
• Premium, max access time 60 minutes
• Created procedures to build drive to premium PNR
  lots to focus on appropriate market, minimizing
  illogical paths. Maximum access time increases
  as market direction is approached
• Refined mode-to-mode transfer prohibitions,
  improving transit paths
• Improved Bus Rapid Transit (BRT) coding methods

33
ARCs Drive Connectors to PNR Lot on Highway
Network
34

ARC TRANSIT CODING EXAMPLE
35
Coding Rail
Rail Station
Coding Rail
Transfer Link
Bus Station
Highway Network
PNR Lot
Highway Node
36
Coding BRT
Coding BRT
37
Transit routes coded on highway network
38
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39
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40
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41
Tour-based and day-based models
42
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43

• Guy Rousseau
• Modeling Manager
• Atlanta Regional Commission
• 40 Courtland St, NE
• Atlanta, GA 30303
• 404-463-3274
• grousseau_at_atlantaregional.com
• www.atlantaregional.com