Collision with Chronos) is the fourth novel by the science fiction author Barrington J. Bayley.

The novel was inspired by the multiple time dimensions proposed by J. W. Dunne.

The plot centers on the collision of two alternate "presents", with disastrous implications for reality.

[1] John Clute described Collision Course, along with Empire of Two Worlds and Annihilation Factor, as "variously successful" but held that The Fall of Chronopolis was Bayley's most fully realised time travel story.

[2] Reviewing the novel in Vector, Brian Stableford criticised Bayley's tendency to arbitrarily switch between viewpoints but concluded that "[y]ou will find it a rewarding experience.