Route S5 begins at Bijogi Junction with the Tokyo Gaikan Expressway in Toda as a continuation north for the
Ikebukuro Route. From this southern terminus, it travels northwest out of Toda, crossing in to the southwestern part of the city of Saitama. Route S5 meets its northern terminus at Yono Junction where it intersects Japan National Routes
16 and
17 one last time and then continues on as the Saitama Shintoshin Route eastward towards the central part of the city of Saitama. The expressway is paralleled by the Shin-Ōmiya Bypass, a highway signed as National Route 17 which serves as a
frontage road to the expressway. Due to this, all of the interchanges along the expressway, aside from the one at its southern terminus at Bijogi Junction, have incomplete access since drivers can continue along the frontage road and eventually find an entry point to the expressway. The speed limit is set at 80 km/h along the entire route. ==History==