 In preparation for increased congestion during the 2020 Summer Olympics, new traffic-control systems were installed along many expressways in the Tokyo area.The only instance of further controls being installed along the expressway was at its western terminus at Ryōgoku Junction

An additional interchange between the Central Circular Route and the Komatsugawa Route was opened on 1 December 2019.Part of the project to add the junction included upgrades to the already extant interchange at Komatsugawa.