It has been a common problem in large cityresidents' life that it's hard to take a taxi. Theincrease of urban population and diversificationof social activities make the demand for taxi rise. Asthe traffic jam becomes worse in cities,toguarantee personal income, many taxi drivers refuse to drive on busy roads and main urbanareas, which makes it difficult for many citizens to take a taxi near some transportationjunctions, commercial centers and hospitals. City construction affects the efficiency of taxi.Being not standard in the taxi industry and taxi drivers' often refusing to take passengers arethe human factors that make it difficult to take a taxi.