Strategic Partnership Projects 
Funds-In Agreement No. FIA-21-17442 
Modification No. 1 
Contractor:                Alliance for Sustainable Energy, LLC 
Operator of the National Renewable Energy Laboratory 
Sponsor:                 Port of Seattle 
Period of Performance:     5/11/21 through 8/11/22 
This modification adds scope and $200,000 to the value of the
agreement. 
Except as stated herein, all terms and conditions of the Funds-In Agreement shall remain in full force
and effect without change. In the event of any conflict between the terms of the subject Agreement and
this Modification, the provisions of this Modification shall take precedence.
Block 3, Financial is hereby amended as follows: 
Cost Estimate Modification No. 1                 $200,000.00 
DOE Administrative Charge Modification No. 1           $0.00 
TOTAL Modification No. 1                       $200,000.00 
Prior Cost Estimate:                              $150,000.00 
Prior DOE Administrative Charge                       $0.00 
Total Cost to Sponsor                            $350,000.00 
Block 6, Agreement Terms and Conditions is modified to reflect the addition of "Appendix A  
Statement of Work for Modification 1 to Funds-In Agreement No. FIA-21-17442" and "Appendix C-1  
Rights in Technical Data for Modification 1" 
"Funds-In AgreementFIA-2117442 Appendix A  Statement of Work for Modification 1" is
hereby added to the Agreement. 
"Funds-In Agreement-FIA-21-17442-1 Appendix C-1  Rights in Technical Data for Modification
1" is hereby added to the Agreement. This Appendix C-1 is only applicable to the work under
Modification 1. Appendix C-3 of the original agreement remains applicable to the original scope of work. 
The parties have indicated their acceptance of this Modification between Sponsor and Contractor by
signature below.
Accepted:                                  Accepted: 
Sponsor                                     Contractor 
By:                                                  By: 
Name:                                Name:    Anne Miller 
Title:                                                     Title: __Director Technology Transfer______ 
Date:                                              Date: 

FIA-mod (2020)                                              1 of 1

Alliance for Sustainable Energy, LLC 
manager and operator of the 
National Renewable Energy Laboratory 
Strategic Partnership Projects 
Funds-In AgreementFIA-21-17442 
Appendix A  Statement of Work for Modification 1 

Notice: By signing this Agreement, the Sponsor acknowledges in advance that its entity name and the
title and non-proprietary description of the project are available for public release by the Contractor
without further notice. 

I.     Project Title: 
Passenger travel mode choice modeling 

II.     Non-Proprietary Description of Project: 
Provide technical assistance to develop a mode choice simulator for passenger travel to
and from Seattle-Tacoma International Airport. 

III.    Background: 
Parties to this agreement are: 
Contractor:   Alliance for Sustainable Energy, operator of the National Renewable Energy
Laboratory under Prime Contract No. DE-AC36-08GO28308 for the U.S.
Department of Energy (DOE). Contractor has a facility at 15013 Denver
West Parkway, Golden, CO 80401. 
Sponsor:    Port of Seattle (Port). Sponsor has a facility at 2711 Alaskan Way, Seattle,
WA 98121. The Seattle -Tacoma International Airport (SEA) is a facility of
the Port of Seattle. 

IV.    Statement of Work - Task Descriptions, Deliverables, and Estimated Completion Dates: 
Task 1  Mode Choice Modeling 
The Ground Transportation Access Plan (GTAP) is SEA's programmatic planning
initiative that seeks to balance and address policy challenges related to ground
transportation at SEA, namely (a) greenhouse gas emission reduction, (b) congestion
reduction, (c) ground transportation revenues, (d) customer choice and (e) equity. These
policy priorities were formally adopted by Commission in June 2019 (Resolution 3759).
One of the priority strategies in the 2021 and 2022 GTAP work plans is to study the
potential implications of implementing access fees on private vehicles accessing SEA
roadways. To accurately predict and measure the potential effects of access fees on

FIA Appendix - SOW Mod (4-22-2021)                1

passenger mode choice, it is necessary to develop a passenger survey-based Mode
Choice Simulator model (MCS). 
A robust passenger MCS could have benefits beyond consideration of access fees, such
as:
Analyzing the effects of potential changes to fee structures for parking or other
ground transportation (GT) products to maximize revenue 
Helping to identify opportunities to influence passenger behavior to achieve the
goals included in Resolution 3759 and the Port's Century Agenda of limiting private
vehicle curbside use to 30% of passengers and reducing greenhouse gas
emissions from all sources, including GT, 50% by 2030. 
Project Description 
The primary goal of this project is to create a model that can predict SEA passengers'
mode choice changes in response to changes in the pricing, travel time, or other aspects
of airport trips. Passengers will be segmented into groups to account for differences in
travel behavior between resident and non-resident travelers as well as business and
leisure travelers. The model will initially be based on existing data sources, including
SEA's enplaning passenger survey. The model will be structured so that it can easily be
updated with additional survey information in the future if the SEA choses to conduct
additional passenger surveys. 
To this end, NREL will: 
1.1.  Data Preparation: communicate with SEA on the data sources needed for the
mode choice modeling work, i.e., the relevant variables collected by the enplane
passenger surveys (EPS), and then acquire/process supplemental data required
alongside the survey data for modeling. This will include travel times for all
modes available to each respondent, and the collation of relevant cost and
headway data for airport access modes. 
1.2.  Model Specification: develop segmented models by trip purpose and resident
status (e.g., resident business, resident non-business, non-resident business,
non-resident non-business) and determine the appropriate model format based
on prior modeling efforts and model fit based on input data. The models will
include primary attributes such as time and cost and may include additional
explanatory variables such as bags, party size, age, income, etc. 
1.3.  Review of Model Fit and Iteration: review the model output and consider viability
of the results for practical applications and policy testing. This is an iterative
process through which any issues or anomalies in the statistical model can be
debugged. Multiple model specifications and frameworks will be tested and the
one with the best performance will be recommended for use. 
1.4.  Model Sensitivity Analyses: calibrate the resultant model to any available recent,
accurate mode share data from the airport and perform various sensitivity
analyses and discuss with the SEA team on the intuitive interpretations of the
model estimates. 
1.5.  Interfaces with Other Models: advise the SEA staff on the integration of the
access mode choice models with other SEA specific modeling tools and PSRC
regional travel demand models. 
1.6.  Model dashboard: develop a dashboard based on the model developed in tasks
1.1 through 1.4 and any other relevant data sources that allows the SEA to
analyze how potential changes in policies, operations, or capital projects could
affect passenger mode split in the future. 

FIA Appendix - SOW Mod (4-22-2021)                2

1.7. Passive and Future Survey Advising: advise on the sampling and data collection
along with the specific questionnaire design of the passive survey, should the
SEA team decide that the mode-choice related passive data collection is
necessary. The NREL team will advise the SEA on modifications to
existing/future relevant surveys to maximize future modeling opportunities. 
Data Requirements 
Enplaning passenger survey data 
Pricing information for GT modes (e.g., airporters, taxis, etc.) 
Data on ground truth mode share, for example aggregate volume and average
vehicle occupation monthly or quarterly for 2019 for services such as
Transportation Network Companies (TNC), taxi, rental car and airport shuttle 
Total enplaned passenger volume, monthly or quarterly for 2019 
Data on business/leisure travel ratio
Task 1 Deliverables Table 
Task                         Deliverable                         Schedule 
1.1 Data preparation             List of data requested                   Month 1 
1.2 Model specification           a) Model scripts                         Month 2 
b) Demonstrate model to SEA staff      Month 2 
1.3 Model fit and iteration         Model methodology memo               Month 3 
1.4 Model sensitivity analyses    Brief memo describing:                  Month 5 
a) goodness of fit metrics, including
uncertainty range 
b) summarizing model fit
methodology and results 
c) Model sensitivity analysis 
1.5 Interfaces with other          N/A                                      TBD 
models 
1.6 Model dashboard            Model dashboard                     TBD 
1.7 Survey advising              N/A                                    TBD 

Task 2: Sustainable Infrastructure Advisory Support 
Project Description 
In parallel to technical tasks, NREL will be available for consultation in an advisory role for
discussions related to sustainable infrastructure and long-term planning related to the
integration of energy-efficient and renewable energy technologies. 
To this end, NREL will: 
2.1.  Work with SEA staff to identify an advisory mechanism and meeting framing
suitable for informing ongoing discussions at the Port. 
2.2.  Support SEA staff with references and connections to research staff able to
advise on particular technical integration and planning questions. 
2.3.  Attend meetings, as needed quarterly, in support of long-term planning
discussions at the SEA. 


FIA Appendix - SOW Mod (4-22-2021)                3

Task 3: Policy Evaluation Tool 
Project Description 
Leveraging the SEA access mode choice models developed in Task 1, a policy evaluation
tool with a friendly user interface will be developed under this task. This tool will allow
flexible inputs, primarily featuring an access mode choice simulator, and will generate
outputs in formats that are intuitive to the users at the SEA and that allow SEA staff to
evaluate various ground transportation policies.
SEA and NREL agree that NREL will publish any software created under Task 3 under an
open-source software license. 
To this end, NREL will: 
3.1.  Design Plan: draft a tool design plan based on discussion with SEA staff on
needs, requirements, software preferences, maintainability, existing solutions,
and other issues. The SEA will review the plan and work with NREL to finalize
the plan. Once finalized, the tools will be posted on an easily accessible
repository such as GitHub for future access and maintainability. 
3.2.  Multi-Criteria Evaluation (MCE) benefits calculator: investigate potential solutions
for a multi-criteria evaluation cost benefit analysis calculator, including attributes
such as cost, environmental impact, and equity elements. NREL will design the
calculator in such a way that it will leverage the predicted mode choice decisions
whenever appropriate and discuss with the SEA staff on the assumptions for
other additional inputs, such as the capital/maintenance cost for the system on
curbside access fee. NREL will also leverage variables on sociodemographic
characteristics in the EPS to develop indicators on equity evaluation, to answer
questions such as whether subsidizing TNC will only benefit the high-income
group and whether implementing the access fee will impact different
demographic groups to the similar extent.
3.3.  User Interface/Dashboard: develop a user interface and analysis dashboard for
this policy evaluation tool that allows the user to define policy inputs, run the
models, and review outputs in tabular and visual form. This policy evaluation tool
will be in a format of either a standalone application based in R/Python or a web
interface and it will enable long-term usability and maintainability. NREL will
discuss with the SEA on the preferable format for the SEA staff. 
3.4.  Tool Validation and Calibration: test the tools to ensure they predict ground
access behavior in ways that are intuitive and reasonable to SEA staff. As part of
this work, tools will be calibrated as necessary to enplanements and other
metrics. 
Data Requirements 
Current and anticipated future flight schedule 
SEA dwell time distribution for departing and arriving passengers 
Task 3 Deliverables Table 
Task                        Deliverable                          Schedule 
3.1 Design plan                 Policy evaluation tool design plan         TBD 
memo 
3.2 Multi-Criteria Evaluation     a) Model scripts (software)                 TBD 
benefits calculator           b) Demonstrate model to SEA staff        TBD 

FIA Appendix - SOW Mod (4-22-2021)                4

3.3 User interface/dashboard   Standalone model application             TBD 
(software) 
3.4 Tool validation and          Brief memo describing goodness of fit     TBD 
calibration                     metrics, including uncertainty range 

Task 4: Policy Scenarios 
Project Description 
Utilizing the policy evaluation tool developed in Task 3, NREL will evaluate a fixed number
of policy/infrastructure scenarios and train the SEA staff to use the tool. This part of the
work will focus initially on airport roadway access fee scenarios. However, there are many
other policy levers that this model will be used to evaluate, including improvements in
existing transit options, new transit or other ground access services, policy incentives
(e.g., expedited security for HOV users), operational changes (e.g., relocating TNCs
pickup), and other pricing beyond access fees (e.g., TNCs, parking, taxis, transit, etc.) 
To this end, NREL will: 
4.1.  Scenario Development: work with SEA staff to define several policy scenarios.
This will include helping to develop and define data inputs and assumptions, as
well as output performance measures. 
4.2.  Scenario Implementation: configure and run the scenarios in the tools and
provide results to SEA staff. The scenario interface / dashboard will allow SEA
staff to run scenarios themselves as well.
4.3.  Training: provide training to allow SEA staff to run additional policy scenarios
independently. 
Task 4 Deliverables Table 
Task                       Deliverable                          Schedule 
4.1 Scenario development     Policy scenario descriptions             TBD 
4.2 Scenario implementation   a) Summary technical memo, including   TBD 
all study methodology and results 
4.3 User interface/dashboard   a) Port staff training session              TBD 
b) Documentation memo/reference      TBD 
guide 

Task 5 Other work 
Other work at the direction of the SEA, consistent with the scope and subject to the
availability of funding. 

V.    Schedule: 
The anticipated period of performance for the work under this modification is 5 months. 



FIA Appendix - SOW Mod (4-22-2021)                5

Alliance for Sustainable Energy, LLC, 
manager and operator of the 
National Renewable Energy Laboratory 
Strategic Partnership Projects 
Funds-In AgreementFIA-21-17442-1 
Appendix C-1  Rights in Technical Data for Modification 1 
(Alternative I - unlimited rights/nonproprietary - software) 
1.  The following definitions shall be used. 
A.  "Generated Information" means information produced in the performance of this Agreement or
any Contractor's subcontract under this Agreement. 
B.  "Proprietary Information" means information which is developed at private expense, is marked
as Proprietary Information, and embodies (1) trade secrets or (2) commercial or financial
information which is privileged or confidential under the Freedom of information Act (5 USC  
552 (b)(4)). 
C.  "Unlimited Rights" means the right to use, disclose, reproduce, prepare derivative works,
distribute copies to the public, and perform publicly and display publicly, in any manner and for
any purpose, and to have or permit others to do so. 
D.  "Computer Software" means (i) computer programs that comprise a series of instructions, rules,
routines, or statements, regardless of the media in which recorded, that allow or cause a
computer to perform a specific operation or series of operations; and (ii) recorded information
comprising source code listings, design details, algorithms, processes, flow charts, formulas,
and related material that would enable the computer program to be produced, created, or
compiled. 
2.  For work performed at the DOE facility, the Sponsor agrees to furnish to the Contractor or leave at
the facility that information, if any, which is (1) essential to the performance of work by the
Contractor personnel or (2) necessary for the health and safety of such personnel in the
performance of the work. Any information furnished to the Contractor shall be deemed to have been
delivered with Unlimited Rights unless marked as Proprietary Information. The Sponsor agrees that
it has the sole responsibility for appropriately identifying and marking all documents provided
containing Proprietary Information 
3.  The Sponsor, Contractor, and the Government shall have Unlimited Rights in all Generated
Information, except for information which is disclosed in a Subject Invention disclosure being
considered for patent protection. 
4.  The Government and Contractor agree not to disclose properly marked Proprietary Information
without written approval of the Sponsor, except to Government employees who are subject to the
statutory provisions against disclosure of confidential information set forth in the Trade Secrets Act
(18 USC  1905). 
5.  The Sponsor is solely responsible for the removal of all of its Proprietary Information from the facility
by or before termination of this Agreement. The Sponsor may request the Contractor to return or
destroy all of the Sponsor's Proprietary Information subject to paragraph (2) above. The
Government and Contractor shall have Unlimited Rights in any information which is not removed

FIA Appendix  C-1S Rights in Technical Data (8-7-2019)             1

from the facility by termination of this Agreement. The Government and Contractor shall have 
Unlimited Rights in any Proprietary Information which is incorporated into the facility or equipment
under this Agreement to such extent that the facility or equipment is not restored to the condition
existing prior to such incorporation. 
6.  The Sponsor agrees that the Contractor will provide to the Department of Energy a nonproprietary
description of the work performed under this Agreement. 
7.  COPYRIGHT: The Parties may assert Copyright in any of their Generated Information. Subject to
the other provisions of this clause including Computer Software generated by the Contractor below,
and to the extent copyright is asserted, the Government reserves for itself and others acting in its
behalf, a paid-up, world-wide, irrevocable, non-exclusive license for Governmental purposes to
publish, distribute, translate, duplicate, exhibit, prepare derivative works, and perform any such
copyrighted works. 
For Computer Software generated by the Contractor under this agreement, the Contractor grants to
the Sponsor a royalty-free, nontransferable, non-exclusive, irrevocable worldwide copyright license
for its own use. 
When the Contractor asserts copyright in its Computer Software developed under this Agreement,
the Government has for itself and others acting on its behalf, a royalty-free, nontransferable,
nonexclusive, irrevocable worldwide copyright license to reproduce, prepare derivative works, and
perform publicly and display publicly, by or on behalf of the Government (narrow-license). After the
Contractor abandons or no longer commercializes the Copyrighted Computer Software, the
Government has for itself and others acting on its behalf, a royalty-free, nontransferable,
nonexclusive, irrevocable worldwide copyright license to reproduce, prepare derivative works,
distribute copies to the public, and perform publicly and display publicly, by or on behalf of the
Government (broad-license). 
A separate copyright license may be necessary in Contractor Computer Software developed outside
of this Agreement and used to perform the work in this Agreement, such as creating derivative
works. 
8.  The terms and conditions of this Clause shall survive the Agreement, in the event that the
Agreement is terminated before completion of the Statement of Work. 








FIA Appendix  C-1S Rights in Technical Data (8-7-2019)             2