🚂🛏️📣/🚂💨

#train whistle #locomotive sound #train horn #transportation sound #arrival signal #departure signal

🔔✨➡️

#signal #sign #warning sign #arrival signal #precursor #bell tolls #forewarning

✊🪛

#knocking at door #knock knock #visitor alert #requesting entry #arrival signal

🔔🪛

#doorbell ring #ringing front door #visitor alert #arrival signal #sound at door