Simplify the following text for a Grade 5 native English-speaking person.
Original: These platforms are above the Low Level station and run at right angles , roughly east-west - the lines to the old platforms 1 & 2 pass beneath the High Level station .
Simplified: The high-level platforms run at right angles to the low-level , roughly east-west . The lines to the old platforms 1 & 2 pass beneath the high-level station .