The Transpennine Route Upgrade (TRU) is one of the largest construction projects in Europe. Dewsbury is in the midst of the Huddersfield - Leeds section and you can find all the details on their website at https://thetrupgrade.co.uk/.
When complete it will be possible to catch a train approximately every 10 minutes to either the East or West coast plus London bound trains out of Ravensthorpe, Dewsbury will be one of the best connected towns in the country.