Mayor Bill de Blasio has promised to close down the jail complex at Rikers Island, and Thursday laid out his ideas to make it happen.

With a goal of shutting down Rikers in 10 years, the mayor wants to reduce the jail's population to 5,000 from its current historic low of 9,400.

Strategies include changes to the bail system and supervised release programs that would direct more people out of the jail.

While Rikers is still operating, the plan would also move to improve safety with more than $1 billion in upgrades — including surveillance cameras and housing for mentally ill inmates.

Mayor de Blasio first announced his support for closing Rikers earlier this year.

He says it will be extremely difficult but result in a safer and more fair criminal justice system.

"We are going to accomplish this by significant bail reform, by ensuring that we're able to get people out who are not risky, so these are diversion programs," said Elizabeth Glazer of the Mayor's Office of Criminal Justice.

The mayor's proposal comes out more than two months after an independent commission released its own plan to shutter Rikers Island.

That commission, spearheaded by the city council speaker, proposed putting smaller jails in each borough.

The mayor's plan does not discuss where new facilities would go; in fact, for now he isn't discussing it either.

"We need to see a commitment from the city council members in the districts that have been initially proposed to specifically start the land-use process to achieve it," de Blasio said Thursday on WNYC's "The Brian Lehrer Show."

De Blasio encourages New Yorkers to track the plan's progress on a new city website.