Static Web Map Service (WMS) of Open TransportMap is available at following URL:
https://gis.lesprojekt.cz/wms/transport/open_transport_map
Dynamic, time related Web Map Service (WMS-T) of Open TransportMap shows Traffic Volumes in Liberec region. It is available at following URL:
https://gis.lesprojekt.cz/wms/transport/traffic_volumes
Example application of WMS-T in Liberec region can be found here.