The task of ACO DRAIN® products in the ramp and portal areas of tunnels is the fast and safe surface water drainage. Products for the longitudinal or cross drainage will help to drain the lanes of the roads in an effective way. Additional the rainwater has to be treated before it is directed to the sea or preflooder. ACO drainage products are according to the norms and regulations like EN 124 or EN 1433. The water can be collected and treated in ACO rainwater harvesting tanks and separators.