Estimating The Pass-By and Diverted Trips for "Shopping Typed Land Use

Trip generation represents a key input in traffic impact assessment. accuracy and equitability of the traffic study hinge on the trip generation rates that are applied. Until recently, local engineers have utilized trip generation rates which have been produced abroad, especially the trip rates published by the Institute of Transportation Engineers (ITE). This study attempts to investigate and produce weekday trip rates and equations for shopping complexes in the Klang Valley. The focus of this study is on large shopping complexes, especially those with gross built up area of above 600,000 ft2. In addition to establishing trip rates, this study also focuses on the rates for pass-by and diverted trips. Pass-by and diverted trips are traffic that already using the road network adjacent to the shopping complex and may attracted to the shopping complex. Extensive traffic surveys were carried out to determine the pass-by and diverted trips. Following which a correlation analysis was conducted to test the suitability of the various independent variables in estimating the observed traffic generation. The results showed that, the gross built up area and gross leasable area provide a good fit with the observed traffic volume. For the pass-by and diverted trips, traffic volumes on the adjacent streets yield the best estimates. Based on these analyses, trip generation rates for the pass-by and diverted trips during the generator peaks were established.