Next week, the SOUTHEASTERN railway will have a reduced schedule to reduce the risk of accidents caused by leaves on the line.
The company said it was working with Network Rail to implement a short-term modified autumn calendar "during the worst of the autumn weather" between November 12 and November 16.
It means that some trains out of town will call less frequently at some stations in Greater London.
A spokesman said that 4,000 to 6,000 passengers would be affected every day.
Ellie Burrows, director of railway services for Southeastern, said: "Driving conditions can be particularly difficult for our drivers in this period of the year, and just as we would not ask someone to accelerate on the black ice on the roads, the leaves on the line pose the same danger on the railway.
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"We can not risk passenger safety by driving trains at full speed when conditions are bad".
He said that changes were made to ensure the safest and most reliable services.
Passengers are advised to check their trip on the Southeastern website or on their mobile app, check for information on National Rail or tweet on @Se_railway or follow the hashtag #SEautumn.