Questions & Answers about Поезд стоит на платформе.
To express movement toward the platform, you switch from the Prepositional to the Accusative case. You also keep the preposition на for direction.
So: Поезд едет на платформу.
Here платформу is Accusative singular (ending -у), indicating “onto/into” or “toward.”
Both words can mean “train platform.”
• платформа is the general term for any kind of platform (bus, train, speaker’s, etc.).
• перрон specifically refers to a railway platform (the raised area alongside the tracks).
In everyday speech at a train station, you’ll hear both, but перрон is more narrowly railway-focused.
First-declension feminine nouns with stems ending in a vowel or certain consonants take -е in the Prepositional singular:
• платформа → на платформе
By contrast, nouns whose stems end in -г, -к, -х, -ж, -ч, -ш, -щ often take -и instead:
• печка → (о) печки
Rules vary by consonant type and spelling, so it’s best to learn case endings with noun paradigms.