Cases studies

From Bordeaux to Stockholm, 6 examples of Keolis' eco-networks
Buses that run on natural gas or electricity, drivers trained in eco-driving, an electric ferry, solar panels to generate green energy ... Let’s take a look at six of the many Keolis operated sustainable mobility initiatives.

Lille has turned the page on diesel


Since February 2014, all 430 of Lille’s buses have been running on natural gas. This has a number of advantages, including a 23% reduction in CO2 emissions compared to conventional diesel vehicles and a curb on fine air particulates. They also provide extra comfort for passengers, being twice as quiet as buses that run on diesel. In addition, some of the gas is locally produced biogas, from the methane conversion of green waste from the Greater Lille area. All in all, 100% of Lille public transport journeys are now made using an alternative to diesel: electricity for metro and trams, and gas for buses.

The centre of Bordeaux can breathe easy with the Zeus minibus


For nearly 15 years now, Bordeaux has been working to provide its residents with a more environmentally-friendly public transport system. Following a €1.2 million investment, five new electric Zeus minibuses entered into service in the city centre in April 2015. Each bus can carry up to 22 people at a maximum speed of 40 km/h, with a range of 140 km. In tandem, Keolis operates 29 hybrid buses, 283 buses running on gas and just 82 diesel vehicles (21% of the fleet).

In Lyon, less pollution and more passengers


Lyon is already achieving optimum energy consumption on its public transport system. Between 2010 and 2014, the TCL network’s public transport uptake increased by 18% while diesel consumption fell by 5%. To get there, Keolis carried out a number of initiatives, involving overhauling the bus network, improving passenger comfort and information, and installing eco-driving devices. At present, 75% of passenger journeys are made in electric mode: this applies to trams and the metro but also includes 5 buses and 131 trolleybuses.

In Lorient, even the ferry runs on electricity


In Lorient, a 22-metre long electric ferry that can be recharged in just four minutes was commissioned in 2013. Named the “Ar Vag Tredan” (“electric boat” in the Breton language), it can make 28 seven-minute return journeys per day between Lorient and Locmiquélic (compared to 30 minutes by road), thus producing a drastic reduction in CO2 emissions, noise and vibration. Fully integrated with the public transport network operated by Keolis Lorient, this vessel was designed by the STX France Lorient shipyard and serves the municipalities around the harbour edge. It is designed to carry approximately 400,000 passengers per year and consumes very little electricity (15 to 20 KW per return journey).

In Dijon, eco-driving and solar panels


In Dijon, 102 buses, or half of the fleet, are equipped with hybrid technology and every one of the network’s 550 drivers has been trained in eco-driving. Environmental concerns are also taken on board when fitting out maintenance centres; waste water is used to clean the vehicles and the roofs of the buildings are covered with solar panels (over 8000 m2). By way of comparison, the electricity produced could cover the annual needs of 500 households ... All in all, this renewable energy has saved the equivalent of 1,454 tonnes of CO2.


For over 70 years, the Swedish capital has been committed to reducing the energy footprint of its public transport system. Keolis uses green solutions such as electric buses and biogas buses on a daily basis. Let’s get the lowdown on this ambitious environmental policy.

Stockholm - a green city? It certainly is! « The city’s waste is used to produce the gas to power its buses », says Keolis Executive Chairman Jean-Pierre Farandou. And this approach isn’t something that started yesterday. Since 1941, the Swedish capital has been recycling its wastewater and restaurant grease and transforming them into reusable energy. Some 36% of the city’s buses, operated by Keolis, run on biogas.

The Henriksdal plant lies in the southeast of the city. Here, the only sign of what goes on underground is a chimney protruding from the hillside. Some 20 kilometres of tunnels had to be dug out and pools and reservoirs created to achieve this ingenious recycling system. Every year, over 850,000 m3 of waste passes through the plant to be transformed into biogas after a fermentation stage lasting 15-20 days.


Electric buses recharged in 6 minutes

In addition, in March 2015 Keolis launched a new fleet of hybrid electric buses on an eight-kilometre long route in the centre of Stockholm. These vehicles produce 90% less pollution than conventional diesel buses.

The batteries can cover seven kilometres of the eight kilometre route and recharge in just six minutes - a record - on arrival at the terminus. For the last kilometre, the buses switch to an engine that runs on biodiesel.

Although on the surface these Volvo buses seem nothing unusual, as soon as you board one you notice a significant difference: they make no noise!