For the former residential area, the desire of residents there to buy cars is enormously smaller; thus, the proportion of trips by car is not high, and the low proportion of car ownership is an important reason for the relatively low elastic travel frequency there; therefore, as a whole, the average frequency of trips there is lower than that of newly developed residential areas. For the latter, it is more difficult to park cars, and the residents there are mostly the aged; thus, the proportion of trips by car in such areas is extremely low. Some residents only drop around and walk within the neighborhood for shopping. Walking and bicycle travel time do not meet the basic conditions of the scientific definition of a trip; so the average frequency of trips there is relatively low.