ABSTRACT
Street drainage systems are vital to the urban environment. If the drainage system is not designed properly, the roadway system will be degraded to an unacceptable level during storm events. The street hydraulic storage capacity (SHSC) is related to the stormwater storage volume in a sump area. In addition to the street slope, stormwater on the street must be managed under safety criteria that involve water flow velocity, water spread, and water depth in the gutter. Although street inlets and sewers are designed to quickly collect stormwater on the street, it is important to understand that the most efficient street drainage design is to take advantage of the SHCC as the rules and regulations permit. The optimal use of the SHCC can significantly reduce the number of street inlets and the sizes of storm sewers.
