Powering Cleaner Transportation with Data
Turning Transportation Data into Climate Action
Closing the Gap Between Ambitious Goals and Real-World Results
The Scale of the Challenge
Transport is responsible for roughly a quarter of global energy-related CO2 and is the largest enduse source of emissions. In the USA, transportation is the largest direct source, accounting for about 28-29% of national GHG emissions in 2022. This dominance reflects decades of growth in vehicle ownership, urban sprawl, and car-dependent infrastructure that have locked cities and regions into carbon-intensive transportation networks.
As nations pursue net-zero goals under the Paris Agreement by 2050, transportation stands as both a significant challenge and a a critical opportunity for deep decarbonization. However, translating these global ambitions into local action remains a significant challenge.
Why Better Data Matters
Local jurisdictions and transit agencies continue to face persistent structural challenges such as fragmented funding and capacity constraints that limit their ability to act decisively. Funding streams are fragmented across federal, state, and local levels, while staff capacity for data analysis and modeling remains severely limited. Legacy infrastructure further limits the flexibility for reimagining transportation networks.
Even with a strong commitment to action, the capacity to quantify and prioritize high-impact transportation decarbonization strategies is often lacking. These institutional and financial limitations reinforce the need for practical, interoperable tools and governance frameworks that can guide coordinated climate action across jurisdictions and scales.
Bridging these institutional gaps requires not only improving available resources but also enhancing the quality of the data and analytical tools accessible to decision makers.
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From Insight to Impact
For transport authorities, metropolitan planning organizations, and city planners, making meaningful progress towards transportation decarbonization depends on access to accurate, granular, and actionable data.
They must not only understand current emissions baselines but also evaluate, with precision, how proposed interventions, such as vehicle electrification or mode shift strategies, can alter future emissions-reduction trajectories. Each strategy can carry trade-offs- investments in electric buses may compete with funding for active mobility infrastructure, while congestion pricing may reduce vehicle miles traveled but raise political and equity concerns.
To make high-impact investment decisions, decision-makers need tools that combine rigorous emissions modeling with economic impact analysis, allowing users to test how specific strategies affect costs, co-benefits, and distributional impacts across communities.
By linking inputs to outcomes through a transparent, scenario-based framework, the tool helps decision-makers understand not only what works but also why it works.
Behavior and Technology Must Work Together
Decarbonizing transportation will require transformations in both behavior and technology. Encouraging behavioral change means providing people with real alternatives to driving that are reliable, affordable, and accessible. Options such as transit, walking, and cycling must become the most practical and appealing choices for daily travel.
Technological transformation, meanwhile, centers on the clean energy transition, including the adoption of zero-emission vehicles, the integration of renewable energy, and the development of smart transportation infrastructure to support emerging mobility systems. Neither behavioral nor technological change alone will be sufficient; both must advance together to reduce emissions while sustaining economic vitality and social inclusion.
Why Transportation Is Still the Biggest Climate Challenge
Breaking Down Barriers to Cleaner, Smarter Mobility
The Decarbonization Gap in Transportation
Transportation remains the most significant barrier to achieving national and global decarbonization goals. While other sectors, particularly power generation, have achieved measurable declines in emissions through fuel switching, renewable energy deployment, and efficiency gains, transportation emissions have remained largely unchanged.
Improvements in vehicle efficiency have been largely offset by rising travel demand and expanding freight activity. Without new approaches that integrate behavioral change, technological adoption, and coordinated policy, the sector is unlikely to achieve its share of national climate targets.
The consequences go well beyond just climate metrics. High transportation emissions worsen urban air quality, raise public health risks, and increase exposure to climate-related events like extreme heat and flooding. For local governments and transit agencies, these issues are made worse by limited funding, fragmented data systems, and inadequate analytical skills.
Transportation remains the most complex and persistent barrier to decarbonization— requiring integrated, data-driven approaches to unlock meaningful, scalable, and equitable progress across regions.
Decision-makers find it difficult to evaluate tradeoffs between different strategies and to focus on actions that offer the most benefits for reducing emissions and promoting equity. Addressing this problem requires more than incremental improvement. It demands integrated tools, interoperable data frameworks, and consistent methodologies that enable cities, regions, and states to make evidence-based decisions that accelerate transportation decarbonization.
The Six Hidden Gaps Undermining Transportation Climate Goals
Following in-depth interviews with a broad range of stakeholders across the mobility ecosystem – including regional planning agencies, state departments, advocacy organizations, research institutions, and private-sector partners – we have identified six significant barriers hindering progress toward transportation decarbonization.
1. Fragmented and Inconsistent Multi-Level Emissions Tracking
Transportation emissions tracking across the United States remains highly fragmented, with no standardized framework guiding how local, regional, or state entities collect or report data. This inconsistency makes it difficult to accurately compare results or aggregate findings across jurisdictions.
2. Weak Link Between Commitments and Measurable Outcomes
Across the transportation sector, there is a pronounced gap between policy commitments and the outcomes reflected in emissions data. Many agencies have adopted ambitious decarbonization goals, but mechanisms to clearly and effectively link these commitments to measurable, verifiable outcomes are often lacking. This sees many strategies being more aspirational than actionable.
3. Data Gaps, Capacity Constraints, and Analytical Limitations
Data limitations and analytical capacity are among the most significant barriers to effective transportation emissions management. Many planning and policy organizations still use outdated or incomplete data.
4. Political and Institutional Misalignment
Institutional fragmentation and political misalignment compound technical challenges. Transportation, land use, and climate policy sit in separate silos with conflicting mandates and timelines, making collaboration difficult.
5. Absence of Human-Centered, MultiBenefit Framing
Where emissions data is technically robust, there is often a failure in communicating how decarbonization translates into outcomes people can see and feel, such as improved air quality, reduced commuting costs, or better access to essential services.
6. Growing Demand for Unified, Flexible, and Accessible Tools
There is growing alignment across the public, private, and advocacy sectors on the need for a unified, accessible platform to support transportation emissions analysis. This a platform would allow planners, policymakers, and advocates to simulate policy scenarios, evaluate trade-offs, and communicate outcomes more effectively.
Market Forces Driving a New Era of Emissions Management
Why Emerging Trends Demand Smarter, Integrated Tools Today
Policy Shifts and Funding Pressures
Several emerging trends are intensifying the need for a more integrated and accessible approach to emissions management. Even as the current federal administration in the United States deprioritizes climate action and equity, the policy landscape is becoming more datadriven at the state and regional levels.
New funding programs increasingly require agencies to clearly demonstrate quantifiable emissions reductions and other co-benefits. Those unable to substantiate performance with reliable data risk losing competitiveness in future funding cycles.
Technology Outpacing Legacy Models
At the same time, technological shifts in mobility and energy systems are expanding the scope of what must be measured. Electrification, shared mobility, and connected transportation networks are generating new types of data that legacy models were not designed to capture. Traditional tools struggle to incorporate these dynamic, real-time datasets, creating an analytical gap in fast-evolving markets.
Compounding this challenge, most regional transportation models remain too coarse, static, and resource-intensive to support timely decisionmaking. They often rely on outdated assumptions about travel behavior and cannot easily evaluate localized interventions, such as mode-shift incentives, first- and last-mile solutions, or VMTreduction strategies.
Cities, therefore, need more agile, modular tools that can integrate emerging data streams and provide faster, more accurate insights to guide planning and investment.
Demand for Transparency and Collaboration
There is also a growing demand for transparency and public engagement. Communities and advocacy groups expect data to be presented clearly and accessibly, not confined to highly complex technical reports. Decision-makers increasingly need visualization tools that connect emissions outcomes to social, economic, and health benefits.
Finally, the convergence of climate analytics and digital infrastructure is increasingly and rapidly reshaping how governments, investors, and technology partners collaborate. The private sector is rapidly developing integrated data platforms that link emissions, equity, and performance metrics, often operating outside traditional public sector systems.
Emerging platforms from technology and mobility firms provide end-to-end analytics for carbon accounting, fleet electrification, and infrastructure performance, integrating geospatial data, IoT sensors, and AI-based forecasting. These systems allow private developers, investors, and corporations to measure, report, and optimize performance.
Shifting Policies and Technologies are Raising the Stakes
Together, these trends point to a clear imperative: the transportation sector requires a new generation of tools that combine analytical precision, interoperability, and effective communication. Such systems will enable agencies to measure, model, and manage emissions in transparent, equitable, and aligned ways with the accelerating pace of global climate action.
Turning Vision into Action
The Transportation Emissions Reduction Calculator
In response to the limitations of existing methodologies, the Transportation Emissions Reduction Calculator, developed by TYLin – a Sidara company – offers a new, integrated approach to planning, evaluation, and communication.
It is designed to bridge the gap between highlevel vision and on-the-ground implementation, helping decision-makers connect policy intent with measurable outcomes. The tool provides clear, data-driven insights that enable planners, policymakers, and communities to identify the most effective pathways toward low-carbon, equitable transportation systems.
The calculator is built to be both technically rigorous and accessible. Through an intuitive interface and clear visualizations, it translates complex emissions data into actionable intelligence.
From Complexity to Clarity
Users can assess existing conditions, test policy scenarios, and quantify co-benefits such as health, safety, and economic outcomes. Unlike traditional modeling frameworks, which require specialized expertise and fragmented datasets, this tool integrates multiple analytical layers — emissions, behavior change, and system impacts —into a unified platform.
The Transportation Emissions Reduction Calculator enables users to:
– Understand current emissions: Establish a robust baseline by evaluating transportationrelated emissions under business-as-usual conditions.
– Support data-driven policymaking: Ground investment and policy decisions in comparative, evidence-based analysis tailored to local conditions.
– Set reduction targets: Develop realistic emissions reduction goals that account for population growth, mode share, and technological change.
– Explore and compare strategies: Examine how investments in transit, cycling, and walkability reduce emissions and improve community well-being.
– Develop comprehensive strategies: Move beyond vehicle electrification to include measures that influence behavior, land use, and mobility patterns.
– Plan for the future: Use outputs to support long-term planning, secure funding, and justify policies through transparent, datasupported evidence.
A More Strategic Approach to Mobility Data
The calculator includes ten key strategies for reducing transportation emissions over the coming decades. Users can adjust the scale and intensity of each strategy to model outcomes that best align with their local context and goals.
This interactive design allows communities to test different combinations of actions, ranging from active transportation and mode-share shifts to technological interventions, and to chart a tailored pathway toward their carbonreduction targets.
The core visualizations of the Transportation Emissions Reduction Calculator compare three emission trajectories:
– Business-as-Usual (BAU): A continuation of current trends with no additional interventions, establishing a reference point for evaluation.
– Ideal Mode Shift in 2050: An aspirational mode shift scenario representing maximum achievable reductions through significant changes in travel behavior.
– Implementation of Selected Strategies: A realistic, policy-driven pathway that reflects the combined impact of chosen strategies.
By comparing these trajectories, users can clearly see the difference between action and inaction, assess the ambition of current plans, and identify where additional measures could close the gap between current and ideal outcomes.
The calculator’s visualizations also display the relative contribution of each strategy to overall emissions reductions by 2050, helping users prioritize initiatives with the highest return on investment and identify areas needing further improvement.
A Clearer Way to Communicate Impact
These insights not only enhance internal planning but also support transparent communication with stakeholders by showing which strategies produce the most significant results.
In addition to emissions outcomes, the calculator quantifies public health and safety benefits in monetary terms, including avoided costs from traffic-related injuries and fatalities, as well as health improvements linked to cleaner air.
Presenting these outcomes in economic terms helps policymakers demonstrate the broader value of sustainable transportation, strengthening alignment with public health goals, stakeholder engagement, and ongoing investment.
By combining emissions modeling, strategy evaluation, and co-benefit quantification, the Transportation Emissions Reduction Calculator transforms complex analysis into practical, actionable insight. It moves beyond traditional compliance tools to become a dynamic decisionsupport system for building healthier, more resilient, and low-carbon communities.
Delivering Impact Through Implementation
How the Calculator Transforms Planning and Decision-Making
Implementing the Transportation Emissions Reduction Calculator delivers both immediate and long-term benefits to planners, policymakers, and communities striving to achieve low-carbon transportation goals.
Solving Persistent Challenges
At its core, the tool directly addresses the persistent challenges of fragmented data, inconsistent methodologies, and limited analytical capacity by providing a unified and standardized platform for transportation emissions tracking and scenario evaluation.
The calculator simplifies data collection by seamlessly integrating inputs from multiple sources, such as travel demand models, land-use data, and emissions inventories, into a single, fully harmonized format.
Built-in data validation reduces the need for ad hoc assumptions or manual reconciliation that are often costly, time-consuming, and prone to error. This approach streamlines analytical workflows, strengthens accuracy, and ensures that decisions are grounded in consistent, transparent, and verifiable data, enabling agencies to align climate planning efforts with funding and compliance requirements more effectively.
Driving Strategic and Organizational Value
Beyond its direct analytical capabilities, the calculator provides significant strategic and organizational advantages. Aligning emissions measurement with investment planning helps agencies make informed, evidence-based decisions that deliver measurable reductions in emissions, improved public health, and stronger economic performance.
The integration of co-benefits, such as safety improvements, air quality gains, and enhanced community well-being, strengthens cross-sector collaboration and builds public trust.
The Transportation Emissions Reduction Calculator offers measurable value by improving overall efficiency, accuracy, and decision-making across every stage of the planning process. Traditional modeling approaches often require extensive manual effort, consultant support, and fragmented data collection.
The calculator consolidates these functions into a single, streamlined workflow that reduces duplication, accelerates analysis, and enables staff to focus on interpretation and strategy rather than data assembly.
The tool’s ability to standardize how sustainability, safety, and health outcomes are measured across projects and scenarios makes it easier for agencies to compare results using a common framework. Quantifying emissions and co-benefits within a single interface improves coordination among departments, bridging the gap between planners, policymakers, and finance teams.
These efficiencies translate into a stronger return on analytical investment rather than simple cost savings. The calculator helps agencies allocate resources more effectively by identifying strategies that deliver the greatest emissions reductions and community benefits per dollar spent., while enhancing competitiveness for external funding.
Adaptability for Diverse Needs
A defining strength of the Transportation Emissions Reduction Calculator is its exceptional adaptability to diverse organizational needs. Its modular design allows users to easily configure inputs, parameters, and strategies according to local data availability, policy priorities, and planning capacity.
Regional agencies can customize the model to reflect specific mode shares, fleet compositions, or growth projections, while smaller municipalities can use simplified configurations suited to their resources. This versatility ensures that agencies of varying scales can use the same core tool to generate insights relevant to their context.
The system’s flexible architecture also supports the integration of new datasets and emerging indicators, such as the progress on vehicle electrification, climate resilience metrics, or social equity outcomes.
As policies and technologies evolve, users can update parameters without reconfiguring the entire platform. This adaptability ensures methodological consistency across jurisdictions while allowing each organization to pursue unique pathways toward its own decarbonization and community goals.
Transforming Mobility in San José
The Move San José initiative set an ambitious goal to increase trips by walking, biking, and public transit from 24 percent to 88 percent by 2050. Achieving this required a strategic, data-driven tool to prioritize investments and align projects with measurable outcomes.
Creating the Foundation for Equity
TYLin partnered with the City of San José to design methodologies for equitable mobility planning, later integrated into the Transportation Emissions Reduction Calculator.
The team also developed a tailored mobility data specification to standardize how equity-related data are collected and used to evaluate access and outcomes for underserved communities.
Driving Impact Through Action
These methodologies informed a project selection tool that helped city leaders prioritize initiatives with the greatest combined impact on sustainability, access, and community wellbeing. Key actions included piloting electric mobility solutions in low- and moderate-income housing and improving first- and last-mile transit connections.
The project also embedded community participation by evolving the city’s Equity Task Force into a permanent advisory body guiding transportation planning. Together, these strategies positioned San José as a national leader in datadriven, equity-centered transportation planning.
Advancing Climate Action and Equity in Seattle
Seattle aimed to accelerate climate progress by cutting greenhouse gas emissions and vehicle miles traveled while promoting sustainable transportation. The city needed an analytical framework that linked emissions outcomes to practical actions and quantified social and economic benefits.
Designing a Custom Solution
TYLin developed a custom emissions modeling and scenario planning tool tailored to Seattle’s policy needs. Working with city staff, the team tested scenarios to evaluate reductions across mode share, travel behavior, cost and revenue.
The model incorporated growth projections, visualized trade-offs, and included equity assessments using Seattle’s Transportation Equity Framework to ensure benefits and burdens were evaluated for frontline communities.
Delivering Actionable Results
The project produced a data-backed action plan that quantified each strategy’s impact and identified the optimal path to meet emissions targets. Beyond emissions and vehicle miles traveled, the model measured co-benefits such as safety, air quality, public health, household cost savings and job creation.
This integrated framework gave Seattle a transparent foundation for decision-making, connecting climate objectives with equity outcomes and long-term economic returns.
Building the Path to Low-Carbon Mobility
Closing the Gap Between Goals and Action
Transportation decarbonization is one of the defining challenges of our era. Cities and agencies worldwide must cut greenhouse gas emissions while improving mobility, safety, and equity for their communities.
Yet progress has been slowed by fragmented methodologies, inconsistent data, and limited analytical capacity. Closing this gap demands more than incremental change, it calls for a unified framework that transforms how decisions are made and how success is measured.
The Transportation Emissions Reduction Calculator was created to meet this need. By seamlessly integrating emissions modeling, scenario analysis, and co-benefit evaluation into one accessible platform, it turns complex data into clear, actionable insights. Planners and policymakers can make smarter, faster, and more transparent decisions that align ambition with measurable outcomes.
The impact goes far beyond emissions reduction. The calculator strengthens coordination across departments, streamlines planning processes, and improves access to performance-based funding. It lays the foundation for a new era of transportation investment – one that balances climate goals with safety, equity, health, and resilience for generations to come.
Melvin Wah
New York Sustainability Lead TYLin, New York, USA
Tom Benson Head of Urban Intelligence Lab Dar, London,
UK
melvin.wah@tylin.com
tom.benson@dar.com
About Sidara
Sidara is one of the world’s leading consultancies, providing design, planning, engineering, and project management services for energy, buildings, cities, transportation, civil, infrastructure, water and the environment.