Modeling Methods and Results from TCI Regional Policy Design Process

Throughout the ongoing regional low-carbon transportation policy development process, TCI jurisdictions have shared updates on the policy development, considerations, and modeling for members of the public to review and provide feedback. This page includes links to recordings, slides, and other resources related to public TCI modeling and webinars.

Resources from the TCI webinar on program design, modeling, and the implications of COVID-19

Wednesday, September 16, 2020

More than 400 participants joined Transportation & Climate Initiative leaders to explore modeling and program development updates during this webinar. Presentations covered new modeling results and discussion of how a regional TCI program could effectively manage a wide range of uncertainties, including those related to COVID-19. The webinar, facilitated by Georgetown Climate Center, provided an opportunity for further public input regarding modeling and how the program could be designed to ensure participating jurisdictions achieve environmental, economic, and social equity goals. Following the webinar, the TCI jurisdictions made available outputs from the TCI-NEMS model -- including data tables from policy cases and Reference Case sensitivity cases -- and methods documentation on the TCI Investment Strategy Tool. The new resources, along with the presentation slides and video recording of the webinar, can be found in the links below. The TCI jurisdictions invite input and feedback related to this webinar and the materials provided here. The TCI Public Input Portal remains open throughout the policy development process. Input related to this webinar is most helpful if provided by September 30, 2020.

Webinar Resources:

Modeling Inputs and Outputs - September 2020

All documents below are in Excel format. Click each to download.
TCI Reference Case
TCI Reference High Emissions Sensitivity Cases
TCI Reference Low Emissions Sensitivity Cases
COVID-19 Sensitivity Cases​
TCI Policy Cases
20% Reduction Trajectory
22% Reduction Trajectory
25% Reduction Trajectory
TCI Containment Reserve Cases
Emissions Containment Reserve
Cost Containment Reserve

Webinar on Draft MOU and Modeling

Tuesday, December 17, 2019

The Transportation and Climate Initiative hosted a public webinar on December 17 to share the latest updates in the TCI regional low-carbon transportation policy development process, including a Draft MOU and preliminary modeling on the potential economic, public health, and emissions reductions benefits of such a program.

Webinar on Draft MOU and Modeling Recording

Webinar on Draft MOU and Modeling Slide Deck

Reference Case Results Webinar

Thursday, August 8, 2019

TCI state leaders shared updates and invited further input and questions from stakeholders to inform the design of a proposed regional cap-and-invest program to reduce greenhouse gas (GHG) emissions from transportation. This interactive presentation reviewed:

  • Updates on the TCI "reference case" modeling run, the first step of the modeling process; 
  • Public input received following a previous TCI webinar on reference case assumptions; and 
  • Final inputs and assumptions that were used to run the reference case. ​
Stakeholders were invited to join to learn more about this completed analysis, ask questions, and offer suggestions for TCI states to consider during the subsequent stages of modeling, including modeling runs that will simulate regional GHG cap levels and other potential program design elements.

Reference Case Results Webinar Recording

Reference Case Results Webinar Slide Deck

Reference Case Assumptions for Policy Program Design

Thursday, May 23, 2019
The Transportation and Climate Initiative and the Georgetown Climate Center presented a webinar to discuss modeling methods that TCI states are considering to inform the design of a proposed regional cap and invest program to reduce greenhouse gas emissions from transportation. The purpose of this webinar was to review data inputs and assumptions that may be used for modeling a TCI “reference case,” which is the first step of the modeling process. Learn more.

Reference Case Assumptions Webinar Recording

Reference Case Assumptions Webinar Slide Deck

Cap and Invest 101 Video

This TCI video lays out the basics behind cap and invest approaches to reduce global warming pollution. The 40 minute presentation covers how cap and invest programs work, and explores how such an approach might be designed to spur investments in low-carbon transportation. It also discusses steps that states have taken to accelerate the transition to a cleaner, more resilient transportation system.