as in other italian cities, the trolleybus system experienced a decline in the second half of the 1970s, with the phasing out of the lines (converted to bus lines), with line 46 closing (converted to buses) on 1 august 1977; followed by lines 32, 33 and 43 on 30 september 1979; and line 42 on 30 september 1981. the final closure was of line 41 on 1 june 1982 — a "temporary" withdrawal of trolleybuses for the summer which was made permanent on 16 september 1982. another source gives the last day of service as 14 june 1982. the fleet was eventually disposed of.