Student or Learner
"The city was at a standstill. People had stopped using their cars and began taking buses. The bus drivers were forced to work overtime, and decided to go on strike. With no buses, the transit system ______________"
Is "collapsed" a suitable word?
I am not a teacher.
You could also use "ground to a halt".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.