An MP is holding a debate in parliament in a bid to get answers for the delayed upgrade to a "miserable" train station.
Tobias Ellwood, MP for Bournemouth East, said the inaction over Pokesdown station was "really frustrating".
The station, which has not had a working lift for more than 35 years, leaves passengers with a 42-step climb to ground level.
South Western Rail (SWR) and Network Rail said they were working on an outline design.
The two companies and Bournemouth, Poole and Christchurch Council have pledged £5.7m to modernise the station.