Original sentence: In 2009, the city called manufacturers for bids on 40 new trams with an option for another 50.The system operates 12 routes constituting 89.5 kilometers of tramlines
Edited sentence: Currently there are 12 tram lines on 89.5 kilometers of track.In 2009, the city called for bids on 40 new trams with an option for another 50.The system operated continuously since 1891 and it was fully changed to electric drive by 1901