Questions & Answers about Автобус остановится у входа.
Russian has two main ways to talk about the future:
Simple future of a perfective verb
- остановится is the perfective future, 3rd person singular of остановиться.
- It usually describes a single, complete action in the future.
- Автобус остановится у входа. = The bus will (once) come to a stop at the entrance.
Compound future of an imperfective verb
- будет останавливаться is imperfective (from останавливаться) + будет.
- It suggests repeated / habitual / long-lasting action:
- Автобус будет останавливаться у входа. = The bus will be stopping at the entrance (regularly / repeatedly).
In your sentence the idea is one concrete event, so perfective остановится is the natural choice.