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Understanding Scope 3 Category 6

Business travel covers emissions from the transportation of employees for business-related activities in vehicles not owned or operated by your organization. According to the GHG Protocol Scope 3 Standard, Category 6 includes:
  • Air travel: Commercial flights (domestic and international)
  • Rail travel: Trains, metro, and high-speed rail
  • Road travel: Rental cars, taxis, ride-sharing, buses
  • Other transport: Ferries, company events transport
Category 6 vs Category 7
  • Category 6 (Business Travel): Trips for business purposes (meetings, conferences, site visits)
  • Category 7 (Employee Commuting): Daily travel between home and work

Prerequisites

Before starting, ensure you have:
Using the Dcycle App?You can track business travel through our web interface:
  • Manual entry for individual trips
  • CSV bulk upload for expense reports
  • Integration with travel management systems

Data Map: Category 6 Requirements Overview

Transport Types

Air Travel (Aircraft)

For flights, emission factors are automatically determined by distance:
Automatic Aircraft SizingWhen you specify transport_type: "aircraft", Dcycle automatically determines the aircraft size based on the calculated distance between origin and destination. You don’t need to specify vehicle_size for flights.

Ground Transport

Vehicle options for cars:

Emission Factor Sources

Dcycle uses business travel emission factors from Ecoinvent:
Ecoinvent 3.8+ Cut-off
  • Comprehensive lifecycle emission factors by transport mode
  • Regional variations (country-specific where available)
  • Covers aircraft, rail, road, and public transport
  • Includes vehicle manufacturing and fuel production (WTW)
Google Maps API:
  • Road distances for car, bus travel
  • Direct distance (great circle) for flights
  • Rail network distances where available
If origin/destination aren’t provided, you can supply distance_km directly.

Step 1: Create Business Travel Records

⚠️ Conditional requirements:
  • Either origin + destination OR distance_km must be provided
  • If both are provided, distance_km takes precedence
Where to get this data:
  • Origin/Destination: Travel bookings, expense reports
  • Transport type: Flight/train tickets, car rental invoices
  • Dates: Itinerary, calendar entries
Track individual business trips:

Common Travel Scenarios

Step 2: Bulk Upload Business Travel

For organizations with many trips, use CSV upload:

CSV Format

CSV Notes:
  • distance_km can be provided instead of origin/destination
  • vehicle_size and fuel_type only apply to cars
  • travel_type: use round or one_way
  • travel_number: multiply for recurring trips

Upload CSV

Step 3: Query Category 6 Emissions

Get Business Travel Totals

Analyze by Transport Mode

Analyze by Employee/Traveler

Best Practices

1. Encourage Lower-Carbon Alternatives

2. Track Emission Intensity

3. Set Travel Policies

Reduction Strategies for Category 6
  1. Virtual meetings: Replace travel with video conferencing
  2. Rail over air: Use trains for routes under 500 km
  3. Electric vehicles: Choose EVs for rental cars
  4. Trip consolidation: Combine multiple meetings in one trip
  5. Travel policy: Set emissions budgets per employee/department
  6. Carbon offsets: Offset unavoidable travel (last resort)

Troubleshooting

Issue: Distance Not Calculated

Issue: Unknown Transport Type

Issue: Category 6 Seems Too Low

Next Steps

Category 7: Employee Commuting

Track daily commuting emissions

Category 1: Purchased Goods

Track upstream product emissions

Category 4: Upstream Transport

Track inbound logistics

Scope 3 Overview

Back to all Scope 3 categories