Patients may be worried or stressed during their visit at a hospital. Therefore, it is important that the surrounding puts them at ease as much as possible. Being able to easily navigate through the building can make a great contribution. However, hospitals are complex buildings, with many departments, corridors and destinations. Unsafe situations arose due to unclear routes in the parking garage of the Martini hospital in Groningen. We first mapped the biggest bottlenecks of the parking garage. Based on this a signage concept with sign locations and contents has been drawn up. Our new floor plans with board locations and board layouts helped improving overview and safety in the Martini parking garage.