Despite changes in working methods and lifestyles, with traditional offices increasingly being replaced by mobile or private workplaces and flexible working time models becoming more and more common, commuter flows in Europe's urban regions are steadily increasing. This results in peak congestion, congested public transport, rising costs and environmental impacts such as increased land use, noise and air pollution. These developments require a rethink of current mobility strategies to reduce the negative side effects and environmental impacts of current mobility systems.In this respect, PSI has also developed a mobility concept to cope with its own increasing commuter numbers and to create new incentives for sustainable commuting. A package of measures will be implemented, which will be scientifically monitored by the ZHAW. As outlined above, the increasing number of commuters also affects PSI, especially with regard to the shortage of parking spaces during peak periods. In addition, PSI, as an ETH unit, is subject to federal law, which enacts regulations on mobility. In this respect, PSI has taken measures with the mobility concept and mobility management to address the parking space problem and federal regulations. The extent to which these measures are achieving their objectives needs to be determined in this accompanying study.To this end, a survey will be conducted with PSI staff for three consecutive years together with targeted focus interviews.