I am Turkish and I don't know what 'bu site bir yerde' means! If I were you I would stick to:'inecek var lutfen'.
You can also add 'burada' (here), or 'durakta' (at the stop), or 'gelecek durakta' (at the next stop) Examples:
Burada inecek var lutfen
Durakta inecek var lutfen
Gelecek durakta inecek var lutfen.
Hope this helps.