tpac | columbus, oh | may 2013 application of an activity-based model for highway pricing studies in...
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TPAC | Columbus, OH | May 2013
Application of an Activity-Based Model for Highway Pricing Studies in Chicago
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CMAP Region
Population: 10.5m 21 counties 2K TAZs 17K MAZs
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Regional Comprehensive Plan GO TO 2040, adopted in 2010 Notorious traffic congestion Pricing queries lead to ABM development
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Why Pricing?
Theoretical Turn external costs inward
Practical Cannot build our way out of congestion
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Express or HOT lanes in the US (2012)
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Why Develop ABM?6
Advanced Model Work Plan Pricing ABM Transit ABM ABM-DTA Integration
Benefits User segmentation Continuous value of time
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Integrated Model System
CT-RAMP demand model Coordinated Travel Regional Activity-based
Modeling Platform Highway Assignments & Skimming
Handles route choice for trucks, externals, & airport traffic
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Distributed Model System
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Model Flow1. Population Synthesis
2. Long-term
4. Daily
5. Tour level
6. Trip level
2.1. Usual workplace
3.2. Car ownership
4.1. Person pattern type
MandatoryNon-
mandatoryHome
4.2.1. Frequency
4.2.2. Destination
4.2.3. TOD
4.3.1. Frequency
4.3.2. Party
4.3.3. Participation
4.3.4. Destination
4.3.5. TOD
4.4.1. Frequency
4.4.2. Allocation
4.5.1. Frequency
4.4.3. Destination
4.4.4. TOD
5.1. Tour mode 5.2. Stop frequency 5.3. Stop location
6.1. Trip mode
6.2. Auto parking 6.3. P&R parking
6.4. Trip departure
Individual mandatory tours
Joint Non-mandatory tours
Allocated tasksIndividual non-
mandatory tours
4.5.2. Destination
4.5.3. TOD
Available time budget
Residual time
Full day
3. Mobility 3.1. Free Parking 3.3. Transit pass 3.3. Toll transponder
2.2. Usual school
4.6.1. Frequency
4.6.2. Destination
4.6.3. TOD
At-work sub-tours
7. Network Simulations 7.1. List of trips 7.2. Trip tables 7.3. Assignment
Model Re-estimated for CMAP Pricing
ABM Auto ownership model Destination choice models Time-of-day choice models Mode choice models
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CT-RAMP Person Types
PERSON-TYPE AGE WORK STATUS
SCHOOL STATUS
Full-time worker 18+ Full-time None
Part-time worker 18+ Part-time None
Non-working adult 18 – 64
Unemployed None
Non-working senior
65+ Unemployed None
College student 18+ Any College +
Driving age student
16 – 17
Any Pre-college
Non-driving student
6 – 16 None Pre-college
Pre-school 0 – 5 None None
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CT-RAMP Activity Types
PURPOSE DESCRIPTION CLASSIFICATION
ELIGIBILITY
Work Working at regular workplace or work-related activities outside the home.
Mandatory Workers and students
University College + Mandatory Age 18+
High School Grades 9-12 Mandatory Age 14-17
Grade School Grades K-8 Mandatory Age 5-13
Escorting Pick-up/drop-off passengers (auto trips only).
Maintenance Age 16+
Shopping Shopping away from home. Maintenance Age 5+
Other Maintenance
Personal business/services, and medical appointments.
Maintenance Age 5+
Social/Recreational
Recreation, visiting friends/family.
Discretionary Age 5+
Eat Out Eating outside of home. Discretionary Age 5+
Other Discretionary
Volunteer work, religious activities.
Discretionary Age 5+
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Road Pricing Essentials
Variation in Value of Time ABM - continuous VOT distribution EMME - discrete VOT classes (high & low)
Vehicle occupancy ABM & EMME - 3 discrete classes
SOV, HOV2, HOV3+ Route type choice
ABM & EMME explicitly treat toll & non-toll users for each segment
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Value of Time
VOT by travel purpose & person type Car occupancy accounts for cost sharing
VOT(HOV2) = 1.6 * max(individual VOT) VOT(HOV3+) = 2.3 * max(individual VOT)
Static assignment & VOT
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Example of VOT Distribution
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EMME Macro 0. Initialize matrices mf123-mf166
Travel (auto) modes mf123-mf134
Non-travel modes mf135-mf166
1. Base multi-class assignment to get travel times
2. SkimmingPrepare scenario for skimming
Skim for each segment mf175-mf234
3. Utility calculation
4. Route type choice modelTravel (auto) modes mf123-mf134
Non-travel modes mf135-mf166
5. Update demand matricesTravel (auto) modes mf279-mf290
Non-travel modes mf291-mf322
6. Report totals
7. Final assignment with saved class-specific volumes
Spe
cifie
d no
of i
nter
nal i
tera
tions
at e
ach
glob
al it
erat
ion
For base and target year pre-skimming
Integrate travel and non-travel modes
Implement assignment
Bypass auto modes if the core model is used
Bypass auto modes if the core model is used
Bypass auto modes if the core model is used
For the last global iteration only
Travel (auto) modes mf235-mf246
Non-travel modes mf247-mf278
MSA factor
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Route Type Choice
Currently implemented as binary choice Toll vs. non-toll
Explicit modeling of toll users at OD level Accounts for toll bias Allows for VOT variation/segmentation
beyond 12 assignable classes
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Assignable Trip Tables
Total of 44 12 for passenger auto (from ABM) 8 for trucks (EMME route type choice
model) 12 for externals (EMME route type choice
model) 12 for airports (EMME route type choice
model)
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Initial Demand Segmentation
Vehicle Type & Value-Of-Time
Non-toll SOV
Non-toll HOV2
Non-toll HOV3+
Toll SOV
Toll HOV2
Toll HOV3+
Auto low VOT
1 3 5 2 4 6
Auto high VOT
7 9 11 8 10 12
Commercial 13 14
Light truck 15 16
Medium truck
17 18
Heavy truck 19 20
External low 21 23 25 22 24 26
External high
27 29 31 28 30 32
Airport low 33 35 37 34 36 38
Airport high 39 41 43 40 42 44
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Desired Multi-Class Assignment
Vehicle Type & Value-Of-Time
Non-toll SOV
Non-toll HOV2
Non-toll HOV3+
Toll SOV
Toll HOV2
Toll HOV3+
Auto + external + airport low VOT
1 3 5 2 4 6
Auto + external + airport high VOT
7 9 11 8 10 12
Commercial 13 14
Light truck 15 16
Medium truck 17 18
Heavy truck 19 20
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Multi-Class Assignment
Vehicle Type & Value-Of-Time
Non-toll SOV
Non-toll HOV2
Non-toll HOV3+
Toll SOV
Toll HOV2
Toll HOV3+
Auto + external + airport low & high VOT
1 3 5 2 4 6
Commercial + light truck
7 8
Medium truck
9 10
Heavy truck 11 12
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Projects
New highways IL 53/120 Elgin O’Hare West
Bypass Add lanes
I-90 I-290 I-55
IL 53/120
EOWB
I-90
I-55
I-290
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Setting Toll Rates
Current Set to recover construction & operating
costs Congestion pricing
Set to achieve performance objectives Maintain free flow speed Maximize revenue Maximize throughput
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Setting Toll Rates
Set toll based on modeled delay Toll Rate = (Hrs of Delay * VOT per Hr) /
Miles
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Travel Times (AM Peak)M
inu
tes
$0.00
$2.76$1.30
$2.53
$3.41
$0.00
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Toll Rate ComparisonsTo
ll ra
te (
$/m
ile)
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Other Findings
Mode Share Small HOV increase & SOV decrease
Traffic Spillover Arterials & General Purpose Lanes
Decreased congestion
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Other CMAP Efforts
Outreach Further study
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29
Questions?
Matt Stratton, [email protected] Wies, [email protected] Vovsha, [email protected] Stabler, [email protected]