Oncoming means coming straight towards you. Traffic, a storm, a set of headlights.
It goes before a noun, so oncoming traffic and an oncoming train, and the phrase oncoming traffic is on road signs across the country. The word always implies something you must react to, which is why it belongs to driving and to weather. There is a bleak joke about the light at the end of the tunnel being an oncoming train, which uses exactly that expectation.
1adjectiveoncomingApproaching directly towards you.
“He pulled out into oncoming traffic.”
Also accepted in games: approaching
Middle English
on comynge
English, today
oncoming
From Middle English on comynge, oncomynge, oncoomynge; equivalent to on + coming.
Etymology from Wiktionary, CC BY-SA