Lines have now reopened following an earlier fault with the barriers at a level crossing between Edinburgh and North Berwick / Dunbar.
As service recovers, trains may still be cancelled, delayed by up to 40 minutes or revised.
This is expected until 14:00.
ScotRail Customer Advice:
Rail replacement buses will run between Edinburgh and North Berwick from 13:15 operated by Merlin's and AAA Coaches.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
For helpful advice if you need to travel on a rail replacement service, including accessibility information, please use our travel information pages.
You can find the location of your replacement bus by checking station signs or by searching for your station on our station information pages.
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.