Commuters will be able to set sail again after the bank holiday weekend.
Ministers say the cash will be used to help develop detailed plans for the long-sought improvements.
Views on how additional capacity might be created will be sought from next month, officials have suggested.
King's Lynn Preservation Trust has "very serious concerns"
Commuters could have to fork out more than £100 extra next year, as campaigners call for action to encourage passengers to travel again.
Communities are being encouraged to give up their cars for a day next month in a new initiative which aims to promote greener forms of travel.
The plea comes as forecasters predict the hot weather will continue for several days and after emergency restrictions were introduced in one village.
Passengers are being advised to check before they travel.
The case for seven separate options to improve a key transport link will be examined by political leaders this week.
A total of 14 routes will see works carried out over the coming months, officials say.
Emphasis on cycling being critical to the county’s health post-Covid.