The state Supreme Court ruling striking down the authority of a Northern Virginia transportation body will lead to delays in some major Arlington County transit projects and will force the county to scramble to fund some projects that it can’t put off, officials said.

The General Assembly authorized the Northern Virginia Transportation Authority to levy taxes on Northern Virginia home sales, car rentals, car registrations and hotel-room stays, and distribute them to localities for transportation projects — a system the court ruled was unconstitutional because the NVTA is composed of nonelected officials.