A Parkingconstrained Allmode Airport Ground Access Mode Choice Model - PowerPoint PPT Presentation

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A Parkingconstrained Allmode Airport Ground Access Mode Choice Model

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Auto ownership. Employer-paid travel? Logan flight frequency ... Origin Transportation Analysis Zone. Residential Origin? Party size. Day of week begun ... – PowerPoint PPT presentation

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Title: A Parkingconstrained Allmode Airport Ground Access Mode Choice Model


1
A Parking-constrained All-mode Airport Ground
Access Mode Choice Model
  • Ian Harrington
  • Central Transportation Planning Staff
  • Boston, Massachusetts

2
Objectives of Presentation
  • Explain reasons to model airport ground access
    mode choice
  • Describe structure of model
  • Define model parameters and data sources
  • Describe features of model

3
Why Model Airport Mode Choice?
  • Logan Airport passengers account for about 0.5
    of weekday person-trips in Eastern Massachusetts
    region (74,000 trips in 2007)
  • Logan Airport is located in congested area
  • Special services for airport passengers
  • Airport mode choice has different factors
  • Port authority is interested in more detail

4
Model Structure
  • Create separate model for each market segment
  • Resident Business
  • Resident Non-Business
  • Non-Resident Business
  • Non-Resident Non-Business
  • Model demand for 21 modes, including rental cars
  • Account for impacts of constrained parking supply
  • Estimate egress mode distributions as well

5
Ground Access Modes
  • Rapid transit walk and drive access
  • Silver Line (BRT) walk and drive access
  • Water shuttle walk and drive access
  • Logan Express bus drop-off and park
  • Local bus walk and drive access
  • Private bus
  • Door-to-door Taxi, Shuttle, and Limo
  • Driven Drop-off and Short-term Parking
  • Self Long-term, Economy, and Remote Parking
  • Rental car Logan and Off-airport

6
Model Parameters
  • Passenger characteristics
  • Trip characteristics
  • Regional travel times and costs
  • On-airport travel times

7
Passenger Characteristics
  • Market segment
  • Household size
  • Household income
  • Auto ownership
  • Employer-paid travel?
  • Logan flight frequency
  • Source 2003 Logan Airport Passenger Survey (some
    empty cells filled)

8
Trip Characteristics
  • Origin Transportation Analysis Zone
  • Residential Origin?
  • Party size
  • Day of week begun
  • Trip duration
  • Luggage carried
  • Time period (AM peak, midday, PM peak, night)
  • Airport terminal
  • Source 2003 Logan Airport Passenger Survey

9
Regional Travel Times and Costs
  • HOV and SOV time, distance, and tolls
  • Source CTPS Regional Model highway assignments
  • Transit in-vehicle, wait, and walk times and
    fares walk-access and drive-access for each
    mode (separate walk-access links required for
    each mode)
  • Source CTPS Regional Model transit assignments

10
On-airport travel times
  • Auto to terminals
  • Auto to parking locations
  • Auto to rental car locations
  • Buses to terminals
  • Rapid transit shuttle to terminals
  • Rental car shuttles to terminals
  • Water shuttle bus to terminals
  • Walk from parking locations to terminals
  • Source Travel time runs

11
Resident Business Model
Access Mode
DAT (6)
Parking Nest
Drop-off (2)
Bus Park
Door-Door (3)
WAT (4)
Long-term
Economy
Remote
a
12
Resident Non-Business Mode
a
Access Mode
Parking Nest
W
A
T Nest
Door-Door Nest
Drop-off Nest
Bus Park
T
axi
Limo
Shuttle
Long-term
Economy
Remote
RT
, Bus
Logan Nest
W
ater
, PB
BRT
, LE
RT
W
ater
Bus
BRT
Drop-off
Short Park
13
Parameters Used in Models
  • In-vehicle travel time
  • Out-of-vehicle travel time
  • Auto-access travel time
  • Transfers
  • Travel costs
  • Auto ownership
  • Household income
  • Employer pays expenses?
  • Non-resident origin?
  • Flight frequency
  • Luggage carried
  • Household size

14
Adding Rental Mode
  • Rental decision includes many additional factors,
    so
  • Freeze coefficients for non-rental modes before
    adding rental modes to model
  • Add other parameters to represent rental modes in
    model
  • Rental fees
  • Party size
  • Origin in or near Central Business District
  • Trip duration

15
Non-Resident Business Model
a
Access Mode
Logan Rental
Off-airport Rental
Non-rental Nest
WAT (4)
DAT (6)
Door-Door Nest
Drop-off (2)
Taxi
Limo
Shuttle
16
Non-Resident Non-Business Model
17
Implied Values of Time
  • Values of time implied by in-vehicle time and
    cost coefficients in Resident models

Resident Business
Resident Non-Business
Employer
Self-pay,
Self-pay,
Self-pay,
Self-pay,
Low-income
High-income
Paid
Low-income
High-income
Transit Walk
17
44
52
18
32
Door-to-Door
46
117
140
40
70
17
44
52
18
32
Parking Transit
Parking Logan
29
75
90
29
52
Drop Off Transit
9
13
19
8
18
Drop Off Logan
23
33
49
15
34
18
Implied Values of Time
  • Values of time implied by Non-Resident model
    in-vehicle time and cost coefficients

Non-Resident Business
Self-pay,
Self-pay,
Employer
Non-Resident
Low-income
High-income
Paid
Non-Business
Transit Walk
15
19
26
10
Door-to-Door
36
49
66
37
Drop Off Transit
21
21
42
4
Drop Off Logan
64
64
129
10
Rental
24
32
43
21
19
Parking Constraint
  • Estimate survey period passenger vehicle arrivals
    by day of week
  • Use trip durations to estimate vehicle parking
    demand by day of week
  • Example 1 car arriving on Wednesday for 3 days
  • Sun Mon Tues Wed Thurs Fri Sat
  • 0 0 0 1 1
    1 0

20
Parking Constraint
  • Compare estimate to survey period parking data
    and create parking space demand model.
  • Example
  • Wednesday Total (LT Econ (.5
    ST)).95
  • If demand exceeds supply, distribute excess
    demand from parking to other modes
  • Park .5 Park
    .25
  • Taxi .3 Taxi
    .45
  • Bus .2 Bus
    .30

21
Egress Mode Choice
  • Egress trip characteristics can differ and other
    factors
  • involved in mode choice, so applied results of
  • passenger survey questions
  • What mode did you take from Logan after your
    arrival?
  • What mode do you plan to take from Logan after
    your return?
  • Example 53 of AM peak long-term parking
    accesses
  • are Night long-term parking egresses

22
Model Application
  • Originally estimated and applied with 2003 Logan
    Airport passenger survey
  • Validated with 2007 Logan Airport passenger
    survey
  • Applied to individual survey records with
    appropriate expansion factors
  • Future year applications use same survey records
    with adjusted expansion factors

23
Summary
  • The ground access passenger mode choice
  • model
  • Estimates distribution of Logan Airport passenger
    travel by 21 modes
  • Constrains parking demand to available supply
  • Includes the rental car modes
  • Also estimates egress trip modes

24
Contact Information
  • Ian Harrington
  • ianh_at_ctps.org
  • Chief Transportation Planner
  • Central Transportation Planning Staff to the
  • Boston Region Metropolitan Planning Organization
    (www.bostonmpo.org)
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