T-1A1a-TE-5 - Increase journey sharing

Background

IPCC WG3 definition: M-1A-5 - Shared Mobility.

Increasing the number of passengers per vehicle will reduce the number of cars in traffic, thereby reducing emissions. The average passenger per car when commuting (in England) was 1.2 passengers in 2018.

Sustainability Category: Amber

This transition element has only moderate climate impact but may be necessary for maintaining urban needs, with a clear pathway to decarbonization. While not aligned with net-zero targets, this transition element is actively improving the emissions profile and represents intermediate performance on the path to sustainability.

Transition Element

⁠	⁠
Shift type:	Utilisation Shift
Operations:	vehicle_km
Activity measure:	commutes
Activity conversion:	average_commute_length_to_work / load_factor_car_commute

Activities

⁠	Improves:
	T-1A1a-A-1 - Petrol cars
	T-1A1a-A-2 - Diesel cars
	T-1A1a-A-3 - Gas cars
	T-1A1a-A-4 - Hydrogen vehicles
	T-1A1a-A-5 - LPG cars
	T-1A1a-A-6 - Pure electric vehicles

Parameters

Parameter	Unit	Description
average_commute_length_to_work	km_commute	Average commute length to work (round-trip)
load_factor_car_commute	persons	Load factor car commute
load_factor_increase_car	percent	Passenger occupancy increase factor
proportion_of_personal_vehicles_operation_commuting	percent	Proportion commutes

YAML Specification

sustainability: amber
version: 2.0.1
type: upshift
longName: Increase efficiency of car use through journey sharing.
shortName: Journey sharing
weightInversionExpression:
  expression: ((( %[0] / unknown_x ) / %[1] ) - 1 ) / %[2]
  variables:
  - average_commute_length_to_work
  - load_factor_car_commute
  - load_factor_increase_car
description: Reduce the number of vehicle kilometers from petrol, diesel, lpg and
  natural gas vehicles to fulfill the need of commuting through more efficient commuting
  by car
unitOfMeasure: commutes
cohort:
  expression: '%[0]'
  variables:
  - proportion_of_personal_vehicles_operation_commuting
variablesToUpdate:
- update: load_factor_car_commute
  type: INCREASE
  by:
    expression: '%[0]'
    variables:
    - load_factor_increase_car
carbonCausalChains:
  atoc:
    expression: '%[0] / %[1]'
    variables:
    - average_commute_length_to_work
    - load_factor_car_commute
  chains:
  - chain: petrol_vehicles
  - chain: diesel_vehicles
  - chain: lpg_vehicles
  - chain: gas_vehicles
  - chain: battery_electric_vehicles
  - chain: hydrogen_vehicles
cobenefits:
- air_quality
- reduced_noise
- reduced_accidents
- less_congestion

50% This page is roughly halfway complete and is actively being developed.