1. The Scope 3 Category 7 Imperative
Under the GHG Protocol Corporate Value Chain Standard and the European Union’s CSRD ESRS E1 directive, organizations are required to disclose greenhouse gas emissions arising from employee travel between home and worksites.
Employee commuting typically constitutes 10% to 35% of total corporate Scope 3 emissions. Relying on annual sample surveys (15% response rates) creates acute audit risk. Mitvia provides Tier 2 activity data based on verified passenger-kilometers.
2. Official 2026 Conversion Factors (DESNZ / DEFRA WTW)
| Transport Mode | WTW Factor (kg CO₂e / pkm) | Source Authority |
|---|---|---|
| Solo Car (Average ICE) | 0.2078 | DESNZ / DEFRA 2026 |
| Battery Electric Vehicle (BEV) | 0.0487 | UK Grid Mix 2026 |
| Blended Transit (Rail + Bus) | 0.0659 | DESNZ 2026 |
| Active Commute (Bike / Walk) | 0.0000 | Zero Emissions |
3. Capital Expenditure & Parking Relief
In Western Europe, constructing one structured multi-storey parking bay costs between €18,000 and €35,000 with annual maintenance of €450 to €800.
A 1,500-employee facility shifting 15% of solo drivers to shared carpooling displaces 216 vehicles daily, deferring multi-million-euro parking garage capital expenditure while satisfying CSRD audit criteria.
Simulate your campus carbon & parking savings
Interactive Scope 3 Category 7 calculator and 90-day pilot framework.