Commuters travelling on the Nottingham to Lincoln route are to benefit from an improved Saturday service.
The majority of services run by East Midlands Trains will be around three minutes faster - with the fastest journey time at 47 minutes compared to the current 51 minutes.
There will also be extra services travelling to both cities from Fiskerton, Carlton, Hykeham and Collingham, along with improved services, cleaner stations and trains, better information and new technology.
Rail Minister Claire Perry said: "This is fantastic news for passengers travelling between Lincoln and Nottingham, and I am pleased to see that our £13 million investment in the East Midlands franchise is delivering better journeys for passengers well ahead of schedule.
"This is another example of the work happening to transform the UK's railways through record levels of investment, delivering better journeys for passengers, communities and businesses."
The new improved services are to be introduced seven months ahead of plans.
Sarah Turner, General Manager for East Midlands Trains, said: "The improved weekday timetable we launched last May has been a great success and is already delivering a massively improved service for our customers. Saturday is a popular day for travel with daytrippers, shoppers and of course, people who need to work, and we are confident our new services will make a big difference across all of our local communities."
The new timetable will launch on May 15th and the first day of improved services will be May 21st.