A fault on a train at Carnoustie means trains between Aberdeen and Dundee may be delayed by up to 30 minutes or cancelled.
Disruption is expected until 17:00.
Alternative travel advice
Tickets will be accepted at no extra cost on Stagecoach Buses between Arbroath and Dundee.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.