The Rail, Maritime and Transport (RMT) union said Mr Crow's family have asked for the funeral service at the City of London Cemetery and Crematorium to be private.
But trade unionists, friends and colleagues of Mr Crow, will be invited to line the route of the procession.
The procession will include trade union banners and flags and will end at the cemetery gates.
The RMT executive said it hoped for a huge turnout at the annual May Day march in London to honour Mr Crow, who died earlier this month at the age of 52.
Meanwhile, more details have been released of former Labour cabinet minister Tony Benn's funeral.
The service will take place at St Margaret's Church in Westminster at 11am on Thursday.
Mr Benn's body will be taken by hearse from the gates of New Palace Yard, with family members following on foot.
People wishing to attend have been asked to email email@example.com.
A memorial meeting will be held later in the year.