Dataset of Dock availability of Santander BSS used in the paper "Genetic Hybrid Optimization of a Real Bike Sharing System" MDPI September 2021. The data used in this paper are distributed under the Open Licence from Etalab and were collected using the connector provided by JCDecaux.(JCDecaux. JCDecaux Developer. Open Data. 2021.). This connector’s API provides, for a certain city, an extensive set of attributes in real-time. We have selected and retrieved the number of stations, capacity and occupation every 5 min, in order to figure out the dynamic of users. Within this interval, we will transform the occupation into requests of bikes or docks by means of subtracting consecutive occupation values.