About 1,100 bicycles will be available by this fall. They can be picked up or dropped off on either side of the Potomac River.
The installation will cost D.C. about $6 million. Arlington will pay about $850,000. Both jurisdictions expect to recoup the expense through membership sales, advertising and sponsorships.
Memberships cost $5 a day, $30 a month or $80 a year.
Officials said they could add other jurisdictions, such as Alexandria or Montgomery County, Md.