"Come" vs "come on"-"The bus should come on in at any minute."Is it idiomatic to use "come" to talk about something that's going to happen?

Question

I know I can say

The streetlights come on automatically at dusk.

Now suppose that you and your friend have been waiting for a bus for a while.

And you turn and say

The bus should come on at any minute.

Is that a proper usage for the phrasal verb "come on"?

My intention behind using "come on" instead of simple come is that I think using "come one" implies there is kind of schedule for the buss departure. I am not sure though.

Answer 1

Your first example refers to the following usage:

come on:

to begin to operate:

• Set the oven to come on at six.
• When does the heating come on?

(OLD)

As for the bus I think you should use arrive or come:

The bus should arrive/come/be here any minute.