Railway workers decided to strike after they could not reach an agreement on wages and working conditions in England.
Railroad workers across the country began their first 48-hour strike today.
It is predicted that only 20 percent of the train services across the country can be made.
Network Rail President Andrew Haines warned travelers to travel "if necessary".
Railroad workers will also go on strike this week from 6 pm on December 24 to 6 am on December 27 on Fridays and Saturdays and normally during the Christmas holidays when passenger numbers are high.
Workers will go on strike on January 3-4 and January 6-7 in the new year.
Why are UK Railroad Workers Striking?
Network Rail, which operates the railway lines, offered workers a 5% raise this year and a 4% raise next year.
Mick Lynch, president of the RMT Union, which represents workers, described the proposal as "substandard". 83 percent of the union members participated in the voting and the proposal was rejected with 63.6 percent of the vote.