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)