In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

New cycle routes have been built in and around the centre of Birmingham and speed limits have been (1) ______ on selected roads. The scheme has now been in (2) ______ for a year and has been hailed as a (3) ______ success. Since the new speed limits were (4) ______, the number of accidents in the area have fallen (5) ______.

Select the most appropriate option to fill in blank no.3.