The New South Wales government would create thousands more jobs in Sydney’s west by making its Metro West fast rail link as short as possible, modelling shows.

The underground train linking Parramatta to the CBD is expected to create tens of thousands of jobs along the corridor.

But benefits would be ‘diluted’ with additional stations, a report commissioned by Sydney Business Chamber, Committee for Sydney and Western Sydney Business Chamber found.

Transport Minister Andrew Constance said his preference was for a 20-minute journey, ABC reports, which would require 10 stops under the modelling.

That would lead to 6000 fewer jobs in Parramatta and 4000 fewer in Westmead than a 15-minute journey across six stations.

Job creation would continue to decrease in the western suburbs by adding more stations and slowing the journey to more than 20 minutes.

In Sydney Olympic Park, an additional 75,000 jobs would be created under the 15-minute model or 69,000 under the 20-minute model. Adding another three stations would make the journey 25 minutes, creating 57,000 jobs.

“Our analysis clearly shows that a quicker journey will deliver a jobs dividend for Western Sydney,” Sydney Business Chamber Western Sydney director David Borger said on Tuesday.

“Areas like Westmead and Olympic Park could see an additional 20-30,000 jobs created if the journey was 20 minutes or less. These would also be high-quality, skilled jobs, the sort we need to boost the economy of a rapidly growing Western Sydney.”

The report said Metro West had the potential to be a “city-shaping transport investment” supporting the government’s three cities vision – to “rebalance” jobs and activities away from the Harbour CBD and towards Greater Parramatta and the Western Sydney Airport.

“Maintaining the fastest possible travel time along the Sydney Metro West route between Parramatta and the CBD is crucial to realise this vision.”

The modelling considered the core stations to be Westmead, Parramatta CBD, Sydney Olympic Park, T1 Northern Connection, the Bays Precinct and Sydney CBD.

Modelling used Rydalmere/Camellia, Burwood North, Five Dock and Pyrmont as the tier-two stations added for the 20-minute journey.

Silverwater, Kings Bay and Lilyfield were tier-three stations used for the 25-minute model.

The project would double the capacity of the overcrowded T1 Western Line and could halve the travel time, currently at 32 minutes in the AM peak.

The NSW 2018-19 state budget included a $3 billion reservation for design, planning approvals, land acquisition and early works and tunnelling.

Another $28.1 million was set aside to fast track the business case.

The New Daily contacted Mr Constance and Metro West for comment.