URL: https://d3i71xaburhd42.cloudfront.net/7ccfc0f39fa1d76017871ab0487a44190ef15657/4-Figure2-1.png
URL2: https://www.semanticscholar.org/paper/Method-for-Identifying-\"Bottleneck\"-Stations-on-Watanabe-Shibata/e09234bb7a4bf02459dbaa291bd1739aab9bf214/figure/0
