The government is set to pledge £5bn over the next five years to improve bus and cycling services in England.
In the House of Commons on Tuesday, the prime minister will say the extra money will provide more frequent services and simpler, more affordable fares.
But Labour has accused the PM of refusing to reverse "£645m-a-year cuts to bus budgets, which have caused thousands of routes to be axed".
This comes as the government is set to give the go-ahead to the HS2 project