The pictures show how a new underground platform and changes were made to the toronto go train station during and after construction.

The three figures illustrate the construction process of

Toronto

Correct article usage

the Toronto

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Go

train

station.

Overall

, the origin station had gone through an expansion in order to create a new

level

for people who walk. In the past, the station was divided into three levels, which were utilized for tracking, transiting and a foundation. The

train

track was built above the ground and below

this

level

was a path for passengers to transit. There was a pillar constructed deep underground which was divided into two parts. The hidden part of the pillar was comparatively huge so as to bear the weight of the

train

track,

contrast

Change preposition

in contrast

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to the exposed one. During the construction, the specific track for

train

and walk remained the same

while

the foundation had been converted into a new pedestrian retail

level

. The

pillar

Change noun form

pillar's

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hidden part was

also

revealed and narrowed down, parallel with its size on the transiting concourse.

At the end

of the stage, the existing transit concourse was slightly raised, and another underground

level

was opened.