Explore details about location 首都高速神奈川1号横羽線. 首都高速神奈川1号横羽線 is a location situated within the 神奈川区 alongside other areas such as 新横浜通り (Shin-yokohama dori), 第一京浜 (Daiichi keihin), 首都高速神奈川2号三ツ沢線.