Who am i? (worth 10 points)?!

Question: i am one who comes with a train
i am one who goes with a train
the train has no use for me, yet it cant leave without me.

Who am I?

Answers: i am one who comes with a train
i am one who goes with a train
the train has no use for me, yet it cant leave without me.

Who am I?

railway's sound

caboose
or
passenger
or
a whistle

You look like Bob the Builder. :]

The whistle!

the passenger!?!?! lol

The driver?

a very important passenger
steam

Caboose?

lol. Just a silly guess.

air?

Driver?

a passenger, kind of easy

are you the tracks?

the ticket collector

Ticket Man

you must be smoke yes i am correct

Whistle

engines

tracks

passenger,

"The Toilet"

I'm gonna go a different route here and say " a bride".
The train being the train on her dress.

Smoke.

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