As many as four buses per hour will replace Essex trains over the weekends as part of Network Rail's "robust"contingency plan during engineering works.
Buses will replace all trains between Colchester and Shenfield on the Abellio Greater Anglia line between Saturday, January 31, and Sunday, March 22, and in the process, almost doubling journey times.
Passengers have reacted in fury, including West Ham United season ticket holder Tristan Barrett who has formulated a petition.
Here we break down precisely how weekend commuters in Essex will be able to travel from A to B on the London Liverpool Street to Norwich line on a Saturday.
Colchester
Bus to Billericay – train to London Liverpool Street
First bus London-bound: 3.50am
Last train back from London: 12.18am
Journey length: 1:30-2:12 hours
Four buses running per hour, two per hour on Sundays.
Braintree
Bus to Witham – bus to Billericay – train to London Liverpool Street
First bus London-bound: 6am
Last train back from London: 11.03pm
Journey length: 1:45-1:55 hours
One bus per hour. One per hour Sundays.
Witham
Bus to Billericay – train to London Liverpool Street
First bus London-bound: 4.22am
Last train back from London: 12.18am
Journey length: 1:14-1:46 hours
Four buses running per hour, two on Sunday.
Chelmsford
Bus to Billericay – train to London Liverpool Street
First bus London-bound: 4.52am
Last train back from London: 12.18am
Journey length: 1:04-1:07 hours
Four per hour, two on Sundays.
Ingatestone
Bus to Shenfield – train to London Liverpool Street
First bus London-bound: 5.18am
Last train back from London: 12.18am
Journey length: 40m-49m
One bus per hour Saturdays. One bus per hour Sundays.