Cycling Experts Corstiaan van Elteren Corstiaan van Elteren has been involved in access regulation in (un)staffed bicycle parking since 1998. The starting point for him has always been the traveler, who must be able to pass through an entrance area intuitively and without hindrance. During the years that he has been active in bicycle parking, he has developed a number of widely distributed concepts. From the fully closed ATCS system to today’s open and transparent ZSF solution. By implementing current demands and future wishes of the client or user into the platform, Corstiaan continues to strive to keep bicycle parking attractive for cyclists.