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Changing Habits for Urban Mobility Solutions (CHUMS)

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The CHUMS project promotes car pooling by combining carpooling week, personalised travel plans and a mobility jackpot lottery into one behaviour change campaign. Each campaign element has been shown to produce significant behavioural changes in a wide range of places where they have been delivered: increasing car occupancy, reducing car numbers and significantly reducing energy use. The aim of the project is to apply a composite CHUMS behavioural change campaigns in 5 ‘champion’ cites that represent the scale of carpooling and the diversity of mobility mind-sets across Europe: Craiova (RO), Edinburgh (UK), Leuven (B), Toulouse (F) and Perugia (IT). All of the 5 ‘champion cities’ have existing car-pooling systems, at various stages of maturity, which serve ‘closed’ target groups such as work-places, large employers or universities. Once proven, the application will be equally valid for ‘open’ systems for citizens in general. The project has already developed a European carpooling ‘interest group’ with members from 19 member states and candidate countries; where further take-up of the CHUMS measures will be developed during the project. The CHUMS consortium includes mobility behaviour experts, city authorities and carpool operators.


The expected results will be:
  • 10% increase in average car occupancy for commuter journeys at target employers
  • 11% increase in carpooling mode share
  • 22% reduction in single occupancy car trips amongst the target groups
  • 9.2% reduction in total car trips amongst the target groups
  • 12% reduction in energy use
The above contributes to a 1992 toe/year primary energy savings and 5788 t CO2e/year reduction of greenhouse gas emissions during the project. Furthermore it is estimated that there will be a 20,035 toe cumulative primary energy savings and 58,206 t CO2e cumulative reduction of greenhouse gas emissions by 2020.

Lessons learned

  • Organisations can move slowly: Expect organisations to take a while to commit to a project. Often there are many levels of authority that will need to be consulted for approval.
  • Be prepared to walk away: At the first introductory meeting it usually quite clear whether an organisation wants to put the necessary effort in the carpool project. If you notice a lack of enthusiasm at this point, this will not grow in time; just like the skeptical view on carpooling is hard to diminish in time… Be willing to cut loose businesses they do not support the project.
  • Consider other mobility options: Where there is good accessibility by public transport, this can be more attractive for some employees and also cheaper than going by car. In this scenario – though carpooling is a part of the solution - employers also like to promote other forms of sustainable transport as part of an integrated mobility package. You’ll have to find a good balance between promoting car pooling and other modes of transport.
  • Incentives: when running promotional prize draws ensure the rules are laid out beforehand and are robust. Attractive incentives that are relevant to the target audience are fundamental. Also considering driver/passenger neutral incentives is key.

Partners and coordinator

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Vectos ltd
United Kingdom
Contact point: 
Pickup Laurie


In brief

01/03/2014 to 31/08/2016
Contract number: 

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