CO2FREIGHT function:
Emissions from Freight.

The freight/shipping emission estimations are for Road, Rail, Air and Sea (categorized into Short Sea and Deep Sea). Recommended average emission factors and guidelines have been used as proposed by member companies of ECTA (European Chemical Transport Association) and Cefic which are aligned with CN's recommendations.  Two additional calculations for Intermodal shipping are available: 1) Road with Rail and 2) Road with Short Sea. In both cases, the road distance is assumed to be 10% of the entire journey. ​

Introduction

Parameters

transport_mode : Mandatory. The values for mode of transport are listed here. Deep sea (value: DeepSea) shipping refers to the maritime transport of goods on intercontinental routes, crossing oceans as opposed to short sea (value: ShortSea) shipping over relatively short distances.​ For Intermodal shipping of 1) Road with Rail and 2) Road with Short Sea, the road distance is assumed to be 10% of the entire journey. The permissible values are:
  • Road
  • Rail
  • Air
  • ShortSea
  • DeepSea
  • Road-Rail
  • Road-ShortSea
freight_weight : Mandatory. The weight of freight in kilograms (KG). If an undefined value is passed, it will be set to 1.00
distance_value : Mandatory. The distance of journey in kilometers (KM). If an undefined value is passed, it will be set to 1.00

Usage

Example

CO2FREIGHT(transport_mode, freight_weight, distance_value)
CO2FREIGHT("ShortSea","50000","1200")

Notes:

If the freight journey has two parts in different transport modes which are not covered in Intermodal shipping options, we suggest that the function is called for each leg. For example, if a journey has a road distance of 500km and international shipping leg of 4,000km then call the functionfor 1) Road (500km) and then 2) DeepSea (4,000km) for the same weight. ​