Commuters also face disruptions from full or partial closures of the busy M1 metro line over several weekends,as well as services stopping earlier some nights.
The globe-like structure will tower 30 metres when it is finished,making it visible to passengers when the first flights start late next year.
A union representing almost 1000 rail workers has been unsuccessful in its appeal to the Federal Court of a months-long suspension of industrial action.
The extra costs are aimed at reducing safety risks,the government says.
New data shows commuter numbers have swelled beyond prediction on the busiest section of the M1 line.
The Metro West rail line between the CBD and Parramatta is due to be completed by 2032,which is two years later than previous forecasts.
Prosperity in Sydney has taken a giant step west due to a focus on education and entrepreneurship.
Those crying out for metro extensions in Sydney’s west face a long wait before construction starts - even if the government commits to them.
How long the final section’s open will be delayed hinges on testing of driverless metro trains over coming months.
Seventeen shoes got stuck in escalators in Sydney’s train and metro stations last year – and two escalators are repeat offenders.