Simplify the following text for a Grade 3 native English-speaking person.
Original: A new , second platform was built and the old platform was moved north by about 100 m. For easy access to the platform , a second pedestrian bridge was built . Further , new holding tracks were also built .
Simplified: A new , second platform was built and the old platform was moved north by about 100 m. All together the new station has four tracks .