Our research suggests that the reduction in speed will not significantly increase journey times. As an example, driving up Gloucester Road at 20mph takes approximately 30 seconds longer at 20 mph than at current traffic speeds in the off peak. Overall our research suggests that there will be an average 10 second increase to journey times per mile in the Central area. In addition, the lower speed limit can encourage drivers to shift to walking or cycling, particularly when the average journey to work is three miles long. This shift can help lead to fewer vehicles on the road and a reduction in congestion and therefore journey time.