Operation and Vehicle Optimisation

PostBus uses approx. 39 million litres of diesel annually in Switzerland. Therefore, it supports reducing the burden of fuel emissions on the environment and promotes the reduction of fuel consumption. Examples include:

  • installation of carbon particle filters
  • purchasing vehicles, which meet the strict emission standards
  • efficient vehicle rotation
  • training of the drivers in accordance with Eco-Drive
  • testing of innovative drive technologies (hybrid, fuel cells).

The fuel consumption of PostBus Switzerland Ltd (2010)

Diesel: 39,426,000 litres                        
Natural gas: 70,300 kilograms
Petrol:: 8,000 litres

CO2-balance of PostBus (Impact on the climate in tons of CO2 equivalent)

2010: not yet available
2009: 136 498 t CO2
2008: 133 900 t CO2

PostBus has set itself the goal of saving over 5,000 tons of CO2 in 2011. For this to succeed, diesel usage needs to be reduced by around 2,000,000 litres.

Carbon particle filter, fuel and emission standards

All newly purchased vehicles are equipped with a carbon particle filter. By the end of 2010 there were already 1,548 postbuses, representing 74 percent of the fleet. In 2010 postbuses with carbon particle filters travelled around 85 million kilometres. This is around 83 percent of the overall performance of PostBus.

All postbuses are now powered by low sulphur diesel as standard, the so-called Greenlife diesel. This fuel is basis for the use of carbon particle filters. In the PostBus Switzerland Ltd fleet, no vehicles are fuelled by rapeseed oil fuel or bio-diesel.

The majority of postbuses that have been newly delivered since 2007 fulfil the EEV standard, which is currently the strictest emission standard in Europe. This standard not only surpasses Euro 4 but even the standard Euro 5 that has been in force since October 2009.

PostBus also uses vehicles with carbon particle filters in France in the city traffic and on regional routes and according to EEV standard.

Associated measures

A pilot project in 2008 showed that the installation of a consumption meter had a positive effect on fuel consumption. The device shows the drivers the consumption and encourages a more economical style of driving. This again has a positive effect on the CO2 emission, the maintenance costs and the ride comfort. At the training trips in spring 2010, an average fuel reduction of seven percent could be achieved. In daily use on tight schedules, delays, hectic road traffic or high numbers of passengers, a saving of up to three percent is realistic.

Since 2008 all new postbuses have been equipped with consumption meters. In addition, around 300 vehicles were subsequently converted. The consumption meters are used in buses with a total weight of 10 tons or more. With few exceptions, these are the vehicles in category MIDI and bigger. There are now a total of around 600 postbuses equipped with such a device in Switzerland.

As a further measure, the consumption figures are periodically evaluated and compared with the previous year values in order to promote the positive development of consumption. Drivers are able to acquire an economical driving style in the Eco-Drive courses in the PostBus driving school. By the end of 2011 there will be about 3,000 individual drivers trained in Eco-Drive.