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Support & Examples

Reasons and incentives for retrofitting my truck or my bus?

The Danish Road Safety and Transport Agency has established a principle approval scheme for particulate filters for motor vehicles.
Click here for more details.

Also on 11 June 2014 the Environment Minister of Denmark, Ms Kirsten Brosbøl, announced the launch of the “Clean Air for the Danes” programme. A package of measures worth 149 million Krons (€19 million) and will run over the next three years, aiming at improving air quality in Denmark. The measures include 74 million Krons to retrofit buses in Copenhagen and the programme started in autumn 2014.

Flanders, Belgium
In Flanders, an ecological subsidy has been set up as a financial incentive for companies investing in environmental projects, including retrofitting existing Euro I, II or III freight trucks with diesel particulate filters (DPF). To be eligible for the subsidy, the DPF must either be listed on the Swiss VERT list or have obtained from the Dutch RDW type approval for wall-flow DPFs (Class A). The total cost, i.e. DPF plus installation, qualifies for the subsidy which can represent up to 20% of the amount for small- and medium-sized companies, and up to 10% for larger companies.
Click here for more details from Flemish Environment Ministry or here for information from Federal Environment Ministry.

A 1300€ subsidy is granted for the retrofit of Particulate Filter on buses. It applies to all buses put into service between 1 January 1991 and 31 December 2000 and covers filter systems which have been evaluated by the French Environment and Energy Management Agency (ADEME).
Click here for more details from the French Environment and Energy Management Agency.

Germany has introduced a distance-based toll for all trucks of twelve tonnes gross vehicle weight and above. The new German Heavy Goods Vehicle Toll Level Ordinance (MAUT), that came into force on 1 January 2009, assigns each vehicle one of four categories, A to D, based on its emissions class. The new toll rates mean that trucks with the latest-generation exhaust systems and those that have been retrofitted with particulate filters pay significantly less than high-emission vehicles.
Click here for more details.

Lombardy, Italy
Regione Lombardia in Italy has put €10 million aside to subsidize Diesel particulate Filter retrofit on Euro 0 to Euro 2 commercial vehicles (N1, N2 and N3). The single contribution is limited to €3000. The incentive program started on 1 December 2008 and such retrofit allows to circulate in the A1 Zone of the Lombardy region Low Emission Zone.
Click here for more details (in Italian).

The Netherlands
The Dutch environment ministry provides subsidies to heavy-duty vehicles owners to retrofit them with Diesel Particulate Filters.
Click here for more details.

United Kingdom
On 2 June 2014 the UK Transport Minister Baroness Kramer announced a further £5 million (€5.8 million) fund to be shared amongst local authorities to make improvements to local bus fleets and other vehicles. The scheme builds on the £7.3 million awarded in 2013 across 26 local authorities through the Clean Bus Technology Fund. In 2013 the Clean Bus Technology Fund helped modify over 500 buses. The 2014 scheme allows local authorities to apply for funding to improve other vehicles in their fleets, providing they are used predominantly on local roads with poor air quality. The funding, up to a maximum of £500 000 for any one authority, will allow authorities to retrofit vehicles or convert them to run on cleaner fuels.
Click here for more details.

London, UK
A Low Emissions Zone in Greater London has been in place since 4 February 2008. It applies to Diesel trucks over 3.5 tonnes, buses, coaches, large vans and minibuses.
Click here for more details.

Scotland, UK
The Scottish Government has launched an air quality grant scheme to provide grants to local authorities for retrofitting vehicles operated by them with emissions reduction equipment.
Click here for more details.


Sweden is in the process of introducing a national system for type approval of retrofit systems for Heavy-duty vehicles. Environmental Zones for heavy-duty vehicles already exist in some cities in Sweden, mandating operation in the Zones only with reasonably new vehicles based on Euro classes.
From 1 January 2012, Euro III vehicles can no longer operate in the restricted area. The Swedish Transport Agency (Transportstyrelsen) has been asked by the Ministry of Enterprise, Energy and Communications to develop a national scheme for type approval of retrofit systems. The target is to have a system in place by 1 July 2012 and the notification has already been submitted to the European Commission. Pending formal entry into force, the Swedish Transport Agency will introduce a system with waiver, meaning that retrofit concepts meeting the standards (technical as well as administrative) will be accepted until 1 July 2012.
Six criteria to be fulfilled for retrofit approval:
- Minimum rates of reduction:
..............................NOx PM ..HC ...CO
Euro II base-vehicle .75% 95% 70% 70%
Euro III base-vehicle 70% 90% 50% 50%
- A formal application for approval to be submitted to the Swedish Transport Agency.
- System for failure detection (OBD) must be included in the retrofit kit.
- Supplier has to present a quality assurance system. - 5-year durability of the system is required. Supplier of systems will take over the responsibility and emission warranty from the manufacturer of the engine.
- After installation of the retrofit kit, the vehicle must undergo a registration inspection and information of the type designation for the kit will be included in the registration documents for the vehicle.

Click here for more details on the Swedish Transport Agency notification to the European Commission.

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