Between 2009 and 2012, 30 collisions between straddle carriers have been observed at APM Terminals Rotterdam. Although none of these accidents were fatal, the urgency to decrease the rate of collisions, especially the risk of a potential fatality, is apparent. The measures to prevent these collisions currently in place are developed from an equipment or human perspective rather than a process perspective, which is the expertise of the author. This is reflected by the available and researched safety measures discussed in scientific and industry literature. Collisions are directly related to the straddle carrier locations. Locations are related to a large extent to the route they take across the terminal. In order to investigate the straddle carrier collision problem from a process oriented perspective, the main research question is asked: “How to decrease straddle carrier traffic risk from a routing perspective?”