ecoTriverecoTriver
Sustainability manager analysing event audience-travel emissions on a dashboard

For Sustainability Managers

Audience-travel emissions you can put in your CSRD report.

Primary activity data, UBA TREMOD 2024 emission factors, full audit trail. Built for festivals, concerts, sporting events, venues and tour productions.

Book a 30-min methodology walkthroughRead the full methodology

What ecoTriver is, in one paragraph

ecoTriver is an audience-travel emissions data layer for events. We capture primary activity data — actual passenger-kilometres travelled in matched shared rides — apply the UBA TREMOD 2024 emission factor (0.164 kg CO₂e/km, German fleet-average passenger car), and produce per-ride and per-event records exportable into your GHG Protocol Scope 3 Category 7 inventory, CSRD ESRS E1 disclosures, GRI 305-3 reporting, ISO 20121 management system and SBTi Scope 3 target tracking. Every record is versioned, immutable and GDPR Art. 28 compliant.

60–80%

of an event's total emissions typically come from audience travel — and most of it is never measured.

The Scope 3 gap most events have

Industry research from Julie's Bicycle, A Greener Future and the Powerful Thinking ‘Show Must Go On' report consistently places visitor mobility as the dominant emission category for festivals, concerts and sporting events — ahead of energy, food, freight and accommodation combined. It also remains the least-measured category, because organisers lack a primary-data source. ecoTriver closes that gap by replacing modal-split surveys with measured ride-level activity data.

What ecoTriver gives a sustainability manager

Primary activity data

Per-ride distance × passengers × emission factor. Not modal-split surveys, not industry averages — the actual passenger-kilometres of every matched ride, ready for GHG Protocol Scope 3 quality-tier 1 reporting.

UBA TREMOD 2024 emission factor

0.164 kg CO₂e/km from the German Federal Environment Agency's TREMOD 6.71B model — the German federal reference for road-transport emission factors. Versioned in code, updated annually, never retroactively rewritten.

3× contribution-based climate finance

Each ride routes a 3× climate contribution (minimum €3.69) to verified climate projects. Contribution-based, not offset-based — preserves additionality, avoids double-counting against your inventory, GCCM007-aligned.

Per-event exportable records

CSV/JSON export of every ride: distance, occupancy, vehicle class, emission factor version, contribution amount, project allocation. Drop directly into the carbon accounting or LCA platform of your choice.

GDPR Art. 28 compliant, EU-hosted

Data hosted in the EU. No personal data leaves the EU. Data Processing Agreement (GDPR Art. 28) signed per partnership. Right to data portability and erasure built into the user account surface. Underlying infrastructure (Supabase) is certified to ISO/IEC 27001:2022.

Full audit trail

Every emission factor is a versioned constant in source. Every ride is an immutable database row. Every contribution is a logged transaction. Reproduce any historical CO₂ figure from raw data — ISSA 5000 readiness mapped per element.

Framework alignment

Where ecoTriver data fits in the standards your auditor expects.

GHG Protocol Corporate Value Chain (Scope 3) Standard

Category 7 — Employee Commuting (extended to attendee travel)

Per-ride primary activity data with documented emission factor source — meets the highest data-quality tier for category disclosure.

GHG Protocol Corporate Value Chain (Scope 3) Standard

Category 9 — Downstream Transportation & Distribution

For ticketed events where audience travel is downstream of the organiser's value chain — measured passenger-km × factor satisfies activity-based methodology.

GRI 305: Emissions

Disclosure 305-3 — Other indirect (Scope 3) GHG emissions

Audience-travel category covered with primary data, calculation methodology, base year and emission factor source disclosed in /methodology.

CSRD / ESRS E1 — Climate Change

E1-6 Gross Scope 3 emissions, E1-3 Actions and resources, E1-4 Targets

Quantitative Scope 3 emission data plus qualitative narrative on mitigation actions (shared rides, climate contributions). Output structured to fit the ESRS E1 reporting workflow.

Science Based Targets initiative (SBTi)

Scope 3 target tracking, especially for FLAG and event-led organisations

Year-on-year primary-data tracking of mitigation interventions (modal shift to shared rides) with full audit trail.

ISO 20121 — Event Sustainability Management

Clauses 4.5 (Issues), 6.1.2 (Risks/opportunities), 9 (Performance evaluation)

Audience-travel materiality assessment, mitigation programme, KPI dashboard and stakeholder communication — covered end-to-end.

Gold Standard GCCM007

Methodology for community-based mobility carbon contributions

ecoTriver's contribution flow is structured to align with GCCM007 principles on additionality, MRV and project verification.

Framework citations are best-fit mappings, not certifications. Full methodology, assumptions and version history are documented at /methodology and in the GCCM007-alignment document.

Methodology snapshot

The three constants that drive every CO₂ figure on the platform.

0.164

kg CO₂e / km

Emission factor

UBA TREMOD 6.71B (2024) — German fleet-average passenger car

3×

per ride

Climate contribution multiplier

Contribution-based finance — abundance over equilibrium principle

€3.69

minimum

Contribution floor

Floor ensures every ride delivers material climate finance

Read the full methodology

How this differs from what you're doing now

Contribution > offset

Offset markets price emissions as substitutable. Contribution-based climate finance funds verified mitigation outside your inventory boundary, preserving additionality and avoiding double-counting against your Scope 3 totals.

Primary data > survey estimates

Modal-split surveys produce assumption-stacked numbers — average distance × estimated mode share × tier-3 factor. ecoTriver records actual passenger-kilometres and applies a single documented factor.

Measured > assumed

Most events have a single 'visitor travel' line item populated with industry averages. ecoTriver replaces it with per-ride records that survive third-party assurance.

Pick your event type

Each event type has a tailored ecoTriver surface — fan travel for concerts, multi-day mobility for festivals, recurring matchday flows for sports, venue-wide integration for arenas.

Festivals

Multi-day audience mobility, camping arrival/departure flows, cross-border travel patterns.

Festival showcase

Venues & Arenas

Venue-wide integration with automatic event feeds — every show inherits the carpooling layer.

Venues showcase

Concert Tours

Per-leg fan-travel reporting across an artist's entire tour — aggregate impact attributable to one act.

Tours showcase

Sports & Matchdays

Recurring matchday mobility for clubs and leagues — primary data per matchday, season-aggregated reporting.

Sports showcase

Three ways to start the evaluation

Pick the depth that matches your stage in the buying process.

Book a 30-min methodology walkthrough

Live walk-through of the data model, factor sourcing, export formats and framework alignment with the founder. Right depth for technical evaluation.

Read the full methodology

Open-source-style documentation of every constant, calculation and assumption. No login required. Right depth for first-pass evaluation.

Open methodology

Submit a partnership interest form

Tell us about your event(s) and we'll come back with a tailored proposal — including data flow, branding, contribution structure. Right depth for procurement-stage evaluation.

Open partner form

Frequently asked questions

Generic queries that lead a sustainability manager to ecoTriver — answered with the framework-grounded substance you need. Send missing ones to support@ecotriver.com.

What is Scope 3 Category 7 and why does audience travel fall under it for events?
GHG Protocol Scope 3 Category 7 covers transportation of employees between their homes and worksites. For events, the equivalent — audience travel between attendee homes and the event location — is reported under Category 7 by extension when the organiser treats attendees as a value-chain stakeholder, or under Category 9 (Downstream Transportation) when audience travel is downstream of a ticketed product. Both treatments are accepted; the organiser must document the chosen boundary. Platforms like ecoTriver provide the underlying primary activity data either way.
What is the difference between Scope 3 Category 7 and Category 9 for events?
Category 7 (Employee Commuting) treats attendee travel as analogous to commuting — appropriate for membership-based or recurring-audience events. Category 9 (Downstream Transportation & Distribution) treats it as transportation of customers downstream of a sold product — appropriate for one-off ticketed events. The distinction matters because some auditors prefer one framing over the other. Ride-level data is structurally identical for both: passenger-kilometres × emission factor. Choose the boundary that fits your accounting structure.
Which CSRD ESRS E1 disclosures cover audience travel for events?
Three E1 disclosures map directly to audience travel: E1-6 (Gross Scope 3 GHG emissions — quantitative tCO₂e), E1-3 (Actions and resources — narrative on mitigation programmes such as shared-ride platforms and climate-contribution flows), and E1-4 (Targets — year-on-year reduction tracking against a base year). E1-4 also requires a documented baseline recalculation policy, which is where the choice of fixed or rolling emission factor matters. ecoTriver's per-event reports feed all three, with a documented baseline policy aligned to ESRS E1-4 Para. 34.
How does ISO 20121 treat audience travel as an event sustainability issue?
ISO 20121 (Event Sustainability Management Systems) requires organisers to identify material issues (clause 4.5), assess risks and opportunities (6.1.2), and evaluate performance (clause 9). Audience travel is consistently the largest material climate issue for events — typically 60–80% of total event emissions. The standard expects a documented mitigation programme, measurable KPIs and stakeholder communication. ecoTriver provides the materiality data, the operational programme (shared rides), per-event KPIs and a public impact surface — the ISO 20121 lifecycle for audience travel end-to-end.
How do event organisers set SBTi Scope 3 targets when audience travel is the main driver?
The Science Based Targets initiative requires Scope 3 targets when Scope 3 exceeds 40% of total emissions — a threshold most event-led organisations cross via audience travel alone. SBTi accepts targets framed as absolute reductions, intensity reductions (per attendee or per ticket) or supplier engagement. For audience travel specifically, the practical lever is modal shift away from solo driving; ecoTriver provides primary-data tracking of that lever with year-on-year audit trail back to a documented base year, making target progress measurable rather than estimated.
How does GRI 305-3 reporting work for festival audience travel?
GRI 305-3 (Other indirect Scope 3 GHG emissions) requires reporters to disclose: gross emissions in tCO₂e, gases included, biogenic CO₂ separately if material, the base year, the source of emission factors, the consolidation approach and the calculation methodology. A per-event audience-travel report should supply all seven elements: tCO₂e from passenger-km × factor, CO₂ only (no biogenic), a documented base year, a citable factor source (e.g. UBA TREMOD for Germany), operational consolidation, and an activity-data calculation methodology. ecoTriver's report structure covers all seven.
Which emission factor should events use to report passenger-car audience travel in Germany?
The most defensible factor for Germany and Central Europe in 2024–2026 is 0.164 kg CO₂e per kilometre, from the German Federal Environment Agency's TREMOD 6.71B model (2024 release). TREMOD is the federal reference for road-transport emission factors and feeds the national greenhouse-gas inventory submitted to the UNFCCC. The 0.164 figure represents the German fleet-average passenger car at the national fleet-average occupancy of 1.4 persons. ecoTriver applies it per passenger-kilometre, the methodologically correct unit for shared-ride accounting.
Why 0.164 kg CO₂e per km specifically — and not 0.171 or 0.193?
Common alternative figures: 0.171 (older TREMOD release), 0.193 (UK DEFRA passenger-car average), 0.118 (BEV-weighted European fleet). 0.164 is the most defensible choice for event audiences in Germany 2024–2026 because it (a) matches the national inventory factor your auditor will recognise, (b) is fleet-average rather than vehicle-specific (matching the actual diversity of attendee cars), and (c) is sourced from a public, citable, government-published model rather than a vendor estimate.
What is the difference between primary, secondary and tertiary activity data under GHG Protocol Scope 3 guidance?
Primary data: directly measured from the activity itself (actual passenger-kilometres of each ride). Secondary data: extrapolated from sample surveys or modelled (modal-split survey × average distance). Tertiary data: industry-average proxies with no specific connection to the reporting entity. The GHG Protocol Scope 3 Calculation Guidance favours primary data for material categories. ecoTriver delivers primary activity data with a tier-2 (regional fleet-average) emission factor — the highest practical data-quality combination given that attendee vehicles are not telemetry-tracked.
What is the difference between contribution-based and offset-based climate finance?
Offset-based finance: the buyer claims the offset against their own emissions inventory, treating the tonne avoided as a substitute for the tonne emitted. Contribution-based finance: the buyer funds verified climate action without claiming the avoided tonnes against their inventory. The contribution model preserves additionality (the project would not exist without the funding), avoids double-counting (the avoided tonnes are not subtracted from the buyer's Scope 3 totals), and aligns with the VCMI Claims Code and the IPCC AR6 framing of net-zero pathways. ecoTriver is contribution-based by design.
Why use a 3× climate contribution multiplier instead of a 1× offset?
Three reasons. First, the abundance principle: contribution-based finance is valuable precisely because it over-delivers rather than breaks even. Second, methodological: 1× implies offset-equivalence, which contribution-based finance explicitly rejects to preserve additionality. Third, behavioural: a higher multiplier signals to participants that their action has compounded impact, which improves repeat-engagement rates. ecoTriver applies a 3× multiplier with a €3.69 floor per ride; the methodology is documented at /methodology.
How is additionality and counterfactual reasoning handled for shared-ride climate claims?
Two levels. Project-level additionality is satisfied by funding projects that meet GCCM007 / Gold Standard criteria (the project would not have existed without the funding). Activity-level additionality requires answering 'would this rider have driven solo without the platform?' — modal-shift claims are not credible without a counterfactual. ecoTriver runs a live counterfactual prompt that asks each rider how they would have travelled otherwise (drove alone / wouldn't have come / public transport / other), and the displacement claim is discounted accordingly per ride.
What does ISSA 5000 require for sustainability assurance of audience-travel emissions?
ISSA 5000 — the new IAASB sustainability assurance standard, effective 15 December 2026, replacing ISAE 3000 / ISAE 3410 — requires: clearly defined subject matter, suitable measurement criteria, documented quantification methods, entity-level and process-level controls, evidence-gathering audit trails, and explicit management assertions. For audience travel specifically, that means: every CO₂ figure traceable to raw activity data, the emission factor in force at the time of measurement preserved, immutable historical records, and a publicly disclosed methodology. ecoTriver maintains an ISSA 5000 readiness assessment that maps each requirement to the underlying system or document.
Can event organisers export raw ride-level data into a carbon accounting or LCA platform?
Yes. ecoTriver provides per-event ride-level data on request, with one row per ride: ride ID, event ID, distance (km), passenger count, vehicle class, emission factor version, CO₂ saved (kg), CO₂ contributed (kg), contribution amount (€). The schema follows the standard Scope 3 activity-data shape used by major carbon accounting platforms; custom field mapping for in-house LCA tools can be agreed in the partnership. Self-service CSV export from the partner dashboard is on the near-term roadmap.
Where should event audience-travel data be hosted to satisfy GDPR for EU organisers?
EU-based hosting eliminates the need for Standard Contractual Clauses, simplifies the Data Processing Agreement (GDPR Art. 28), and puts processing under the direct supervision of EU data-protection authorities. ecoTriver is EU-hosted; no personal data leaves the EU. ecoTriver acts as data processor for organiser partnerships under a DPA signed per agreement. Subject rights (access, portability, erasure) are built into the user account surface and exercisable directly by the data subject.
What happens to historical CO₂ figures when UBA publishes a new TREMOD release?
Best practice is to preserve historical figures at the factor in force at the time of the activity. ecoTriver follows this approach: each ride is stored with the factor vintage applied at creation, and new TREMOD releases trigger a new emission factor constant in source plus a database migration that updates the calculation function for new rides only. Year-on-year comparisons can be run either at original-factor-as-recorded (for restated reporting) or at current-factor-recalculated (for like-for-like trend analysis), at the organiser's choice. The full baseline recalculation policy is documented and aligned to ESRS E1-4 Para. 34.
How are voluntary climate contributions allocated and what makes them auditable?
Voluntary climate contributions are auditable when three conditions are met: (1) the projects funded meet a recognised additionality standard (Gold Standard, Verra, GCCM007), (2) every contribution from origin to project allocation is logged as an immutable transaction, and (3) the project list is disclosed transparently. ecoTriver's contribution flow is structured to align with GCCM007, every contribution is recorded per ride with the project allocation, and the project list is disclosed per partnership agreement. Funded project areas focus on community-based mobility and verified ecosystem restoration.