‘Complex issues’ have delayed plans to create a railway station car park for Manea.
The Hereward Community Rail Partnership says it remains committed to the project despite almost two years of talks.
The main reason for the delay is the proximity of the proposed car park entrance to the level crossing.
This means extensive work is needed to address the matter through designs, railway and highway engineering requirements and road safety audits.
Network Rail, Abellio Greater Anglia and Cambridgeshire County Council have to be satisfied all the safety issues have been adequately addressed for the project to move forward.
Rail partnership chairman Simon King, who is also a Fenland district councillor, said: “We appreciate the great support we have had from the local community, which was a key factor in securing a more frequent rail service from Manea.
“That initial success naturally increased expectations that other improvements would follow soon after, including the car park.
“Unfortunately, however, various factors have combined to hold things up and we recognise that is very frustrating.
“There are some very complex issues that need to be resolved but we are working very hard to deliver the car park as soon as possible.”
Meanwhile, the partnership has obtained money needed for one new waiting shelter and discussions are continuing on securing extra funding for a second shelter and a ticket machine.
A bid has also been submitted to the Greater Cambridge Greater Peterborough Local Enterprise Partnership (LEP) for £360,000 to enable further feasibility studies for station improvements at both Manea and Whittlesey.
It has already been established that both platforms at Manea need lengthening to accommodate three or four-carriage trains, which would enable more trains to stop there.