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CO2, Mileage and Fuel Costs Analysis

The original mileage analysis of LTN 21 (Midhurst) identified that the effect of the closures as reducing resident driven mileage inside the LTN area by 59%, but upping the mileage on boundary roads by 187%, with an overall 52% increase.

Rather than using percentages, the new calculation measures  mileage, which permits estimates of fuel motoring hours, CO2 emissions and air pollution within the LTN area and on boundary roads.

The data for the traffic counts came from Sustrans ‘Live West Ealing Living Neighbourhoods’ Publication (2018) Live-West-Ealing_LTN_Engagement-Report_28072020.pdf

The traffic counts do not cover the entire LTN area but for the purpose of the analysis are representative given the anticipated mode shift or unmade journeys predicted by Ealing Council (15% approximately)

Main Findings:

  • Boundary road mileage up by 2.1 million miles
  • Internal road mileage down 0.735 million miles annually
  • Combined vehicle miles up by 1.3 million miles annually
  • Petrol/Diesel up by 44,000 gallons annually
  • Motoring hours up by 66,000 hours
  • Boundary road CO2 emissions up by 730 tons annually
  • Internal road CO2 emissions down by 280 tons annually
  • Combined roads CO2 emissions up 460 tons annually


This analysis does not take into account congestion from the increased volume of vehicles on the perimeter roads.