Railsquid mentioned in the Todoroki thread about the Seibu Shinjuku Line partial undergrounding. It will result in the elimination of numerous grade crossings in this portion of Nakano Ward, which typically remain open for periods of only 20 to 30 seconds during rush hours, causing major motor traffic congestion. Completion scheduled to be 2020.
This is one which will be eliminated, located between Araiyakushi and Numabukuro- officially called the Araiyakushi #2 Crossing, which is where the Nakano Road crosses the Shinjuku Line. Video taken earlier this month.
*get your pics while you can...