Why is the transformation of Shanghai Huaxin so slow?

Shanghai Huaxin transit is so slow because of the mode of transportation, because Shanghai Huaxin transit is land transportation. However, the investment in land transportation construction is large, and it can only be driven on a fixed route, which has poor flexibility and needs to be coordinated with other modes of transportation. Short-distance transportation costs are high, which is greatly affected by the weather and the transportation speed is slow.