Click here to contact us

Changing Habits for Urban Mobility Solutions (CHUMS)  |  @CHUMS_network

 Project Overview

The CHUMS behaviour change strategy included a carpooling week, conducting personalised travel plans which included carpooling options, and providing a mobility jackpot lottery to attract people to carpool. These have all been shown to produce significant behavioural changes in a wide range of places where they had been delivered: increasing car occupancy, reducing car numbers and significantly reducing energy use. This approach was tested and validated 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).

The strategic aim of CHUMS was simple – to achieve changes in travel behaviour mind-sets for commuting by:

  • relying on more energy efficient transport and less congestion
  • reducing single occupancy car trips
  • gaining benefits from reduced pressure from cars at work sites, potentially freeing-up valuable parking spaces.

All of the five ‘champion cities’ had existing car-pooling systems, at various stages of maturity, which served ‘closed’ target groups such as work-places, large employers or universities. Once proven, the application is now equally valid for ‘open’ systems for citizens in general. The project developed a European carpooling ‘interest group’ early on, with members from 19 member states and candidate countries; where further take-up of the CHUMS measures was developed during the project. The 10 fully committed CHUMS partners included mobility behaviour experts, city authorities and carpool operators.

Our Approach

The CHUMS project was implemented through a package of proven energy efficient transport measures which support carpooling amongst employers and their employees:

  • Hosting of “Carpool week”: the launch of an inaugural “Carpool Week”
  • Provision of mobility jackpot lottery rewards: the launch of the Carpool week reinforced by the award of a bumper mobility jackpot prize to incentivise newly aware car commuters considering carpooling to actually make the switch.
  • Delivery of Personalised Travel Plans including carpooling options: to highlight to car commuters the carpooling options available to them which match their personal circumstances and to emphasise the benefits which are important to those individuals.


  • Results showed that successful sites had a critical mass of potential carpoolers of min 2000 employees, and a notable positive incentive was a ‘guaranteed ride home’ if a carpool buddy was unavailable. Poorer performing sites tended to be those with excessive free parking. Carpool weeks and prize draws were generally more effective (and cheaper) than PTPs.
  • Our research showed that younger people are by far the best audience for carpooling. The chance to share space with someone new and get to know them is a positive reason in younger people to carpool but the same thing poses a barrier for older people.
  • Perugia (% who consider carpooling): 18-29 years: 74%   VS   50-59 years: 54%
  • Toulouse (% who consider carpooling): 18-29 years: 72%   VS   50-59 years: 47%

For more details, please visit the CHUMS website.