Hundreds of public bus services in Melbourne's west and north will be cut this year so the eastern suburbs can have more frequent buses if the Andrews government accepts a network overhaul proposed by operator Transdev.

The network changes were drawn up last year and were originally scheduled to have taken effect this weekend, but are on hold while the new government assesses the proposal.

Several routes in the western and northern suburbs stand to be split into shorter runs with new timetables that would entail an overall service cut of more than 20 per cent.

The total weekly bus services on those routes would fall from 2008 services to 1575, internal documents obtained by Fairfax Media reveal.

Buses would be reallocated to busier routes in Melbourne's east and south.