In recent years the problem of traffic congestion is spreading in many large urban areas. According to the Texas Transportation Institute (TTI, 2009), the average American driver lost 36 hours in 2007 sitting in congestion, wasting an average of 24 gallons of fuel. The average losses per driver in cities where the population exceeded one million were 25% higher. These costs were quantified into a national productivity loss of $87.2 billion, a four-fold increase (in 2007 dollars) from 1982. Although the recent economic downturn has only delayed congestion growth, once the economy recovers, congestion once again will be on the rise. Traditionally to reduce the impacts of traffic congestion over the past decades, governments are introducing policies that favour the rational use of private vehicles and prioritize public transport (push & pull). Among several attempts of mobility policies that have been implemented, park and ride has shown outstanding performance especially within European Union nations. By offering new efficient facilities and improving the level of service of public transport passengers are aiming to increase accessibility and decrease the usage of private vehicles, postulating as performances of great success, as his experience in different European cities tested. The Metropolitan Transportation Authority of Catalonia (ATM) has wagered on these systems with the objective of deterring the daily traffic congestion produced on the highways of Catalonia, especially in corridors towards Barcelona. To date, the Metropolitan Region of Barcelona numbers 14.114 parking spaces which are spread over 98 railway stations. The objective of this study is to address the potential improvements of an existing Park & Ride facility located in Mollet Sant Fost. The strategic role of this station, which is located between the highways AP-7, C-59, C-33 and C-17 with the required improvements could attract up to 55.000 new users of the rail network from neighbouring cities. To evaluate the impacts of the current study, it was build a traffic model of the Metropolitan Region of Barcelona. This will help to analyse the existing users’ equilibrium of their daily displacements. Based on a Multinomial Logit demand model, it will be analysed the number of rail passengers attracted by designing these facilities following the implementation of various actions that potentializing their use.