^ I'm not sure what you're referring to. What specific mistake/wording error are you suggesting for this paragraph from the post?
The ‘Push Box’
After this is complete, excavation and shoring works for the QEW underpass will follow. Once the area has been excavated and supported, crews will build the hollow concrete structure, or a ‘push box’ and install temporary track support systems. Following that, hydraulic jacks will be used to slowly push the push box into its place. The QEW push box is the first of its kind in Ontario and will be a permanent structure that will act as a passageway for the LRT to move from surface level and into the underground station platform.