East Japan Railway Co will roll out an expanded smartphone app from mid-July to inform travelers how crowded its main train lines in Tokyo and its vicinity are, following a surge in the app’s use amid the spread of the novel coronavirus.
S East Japan Railway Co
VO [will roll out] an expanded smartphone app
補足 [from] mid-July
VO [to inform] travelers
its main train lines [in] Tokyo and its vicinity
[following] a surge [in] the app’s use
[amid] the spread of the novel coronavirus.