on a collision course

on a collision course

Of a person, group, or object, on a certain path to conflict, collision, destruction, or ruin with someone or something else. The radical left-wing coalition is set to be on a collision course with the majority conservative government this January. Little did the passengers know that they were riding a train on a collision course with disaster.
See also: collision, course, on
References in periodicals archive ?
They were set to walk out on the day Cardiff council's new food waste collections were due to start - a scheme which had set workers and bosses on a collision course.
Their objective is an automatic system that detects an approaching aircraft, calculates whether it is on a collision course and then changes its own aircraft's course faster than a human pilot could.