sentences:  Today Västerbron is occasionally still acting as a reserve when Essingeleden is being closed off for repair and other reasons.From its opening Västerbron was an important passageway of Stockholm’s tram network until the last four lines of the network, one of them line 4 crossed over Västerbron, was closed in September 1967 simultaneously with the switch to right-hand side traffic.In August 1993 a JAS 39 Gripen fighter aircraft crashed on Långholmen only a few meters from the bridge after a low altitude, low speed manoeuvre during an air show.