Glossary & Acronyms

3.5T, 5T, 7.5T … = vehicles with a gross 3.5 tonne vehicles
ARS = (urban) access regulation scheme
CS = (urban) Charging Schemes
Diesel particulate filter = equipment fitted to a vehicle to reduce that reduces particulate, or soot, emissions from the vehicle. These are fitted to newer vehicles when they leave the factory, and can be retrofitted (fitted to an existing vehicle). For more information see Diesel particulate filter & SCR
DPF = Diesel particulate filter equipment fitted to a vehicle used to reduce particulate, or soot, emissions from the vehicle. These are fitted to newer vehicles when they leave the factory, and can be retrofitted (fitted to an existing vehicle). For more information see Diesel particulate filter & SCR
Euro standards = European Vehicle Emissions Standards. These currently go from Euro 1 to Euro 6. We always use numbers to indicate Euro standard, sometimes Roman Numerals are used for heavy duty vehicles Euro standards (so Euro I to VI)
Euro 6d temp = This is an advanced Euro 6 standard, and one that significantly improves the emissions from Euro 6.
FAQ = frequently asked questions.
GVW = gross vehicle weight
HDV = heavy duty vehicle
HGV = heavy goods vehicle
Key-ARS = word we use to indicate significant ARS, for which we have full detail on full pages
LDV = light duty vehicle
LEZ = Low Emission Zone
LGV = light goods vehicle
NOx = nitrous oxides, both nitrogen monoxide (NO) and nitrogen dioxide (NO₂). Emissions from vehicles are often as mainly NO, but also NO₂. NO₂is of concern due to its impact on health. For more information see here
Particulate filter = diesel particulate filter, equipment fitted to a vehicle used to reduce particulate, or soot, emissions from the vehicle. These are fitted to newer vehicles when they leave the factory, and can be retrofitted (fitted to an existing vehicle). For more information see Diesel particulate filter & SCR
PM = particulate matter - for more information see here
Retrofitted = fitting (exhaust reducing) equipment to an existing vehicle (as opposed to fitting it in the factory)
SCR = Selective Catalytic Reduction, equipment fitted to a vehicle used to reduce emissions of nitrogen oxides (NOx)
ULEZ = Ultra Low Emission Zone, planned in London
ZTL = Zona a Traffico Limitato the general name for road restriction, also used for LEZs.

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