The geographic stability of trip generation rates is a major factor in determining data collection strategies. Expensive home interview trip diaries need be collected only in specific geographic areasif the resulting trip rates will be different from those of other areas already surveyed. In the fall of 1986, the new jersey department of transportation, through a consultant, conducted a statewide small sample telephone home interview survey. This survey was divided into two independent parts, northern new jersey and southern new jersey, each consisting of about 1, 400 household interviews. Differencesin home-based trip generation rates tabulated for the areas studied, including the urban and rural portions of the southern study area, provide valuable insight into the geographic stability of trip generation rates, because these areas differ significantly in character.In a summary of the results of a comparative trip generation rate analysis for the new jersey surveys, stratification schemes are tabulated and analyzed to determine the most appropriate basis for makingdisaggregate trip rate coparisons between regions. Trip rates are also tabulated for the delaware valley regional planning commission counties and the remainder of southern new jersey to facilitate coparisons of trip-making characteristics between these geographic areas. Finally, coparisons between the trip-making characteristics of southern and northern new jersey residents are made. This paper appears in transportation research record no. 1220, Forecasting.
Samenvatting