sentences:  While there were initially no plans to retain the surface tracks, several Historic Trolley Festivals in 1980s had proven popular enough to reinstate operations in the form of the F Market historic streetcar line.On September 29, 2009, traffic-calming efforts took effect for a six-week test in which private automobiles would be restricted in travelling east from Sixth Street towards the Ferry Building.All eastbound traffic will be encouraged to turn right onto 10th Street and then required to do so at 8th Street.