But in American spoken language, this phrase is ambiguous, so if you want to express that I'm coming, you can use I'm on my way. ?
Interpretation: I am coming.
Grammar: come can mean "here, here", which is often used to indicate that time or events come naturally according to laws or natural laws, or to participate in an activity with others. ?
Interpretation: I am on the road.
Grammar: the basic meaning of way is "road, road, street and path", which is generally used to refer to the specific "road", and can also refer to the "direction" and "route" leading to a place or the means used to do something, that is, "way and method".