Bus passengers in parts of western Sydney and on the central coast face disruptions to services on Monday when Busways drivers plan to take industrial action following a breakdown in negotiations over a new wage agreement.

Busways services at Penrith, Blacktown, Windsor and Castle Hill will be among those affected between 5am and 9am on Monday while drivers hold a stop-work meeting as they escalate their industrial campaign.

Drivers who are members of the NSW division of the Transport Workers Union have also attempted to apply pressure to Busways management by allowing passengers to board services on Thursday and Friday without paying for their trips with Opal cards.

Busways management has been unsuccessful in its attempt to seek an order from Fair Work to suspend the planned work stoppage on public welfare and safety grounds.