Monona City - WI issued the following announcement on Sept. 24
Due to a shortage of bus drivers, Monona Express afternoon Loops 1 and 3 will not run beginning on September 27. Only Monona Express afternoon Loops 2 and 4 will run until further notice. We apologize for the inconvenience and late notice. First Transit is working to fill the driver position as soon as possible.
Original source can be found here.
Source: Monona City - WI