Vol 6, No 5 (2015) > Civil Engineering >

The Development of a Freight Distribution Model for Connecting Inter-island Freight Transport

Imam Sonny, Sigit P. Hadiwardoyo, Bambang Susantono, Abdellatif Benabdelhafid

 

Abstract:

Inter-island
freight transport costs in eastern compared to western Indonesia are relatively
high, caused by operator charges for
roundtrip fees. In order to make the distribution of freight
efficient, the
network of freight transport needs to be
rationalized on a regional basis. The
output from the regional model counts are few and far
between in relation to
intercity traffic volume data, and the disaggregate model at a regional level requires more effort in conducting
travel route surveys. Therefore, aggregated analysis is preferable
initially, based
on the traffic volume and the commodity flow for inter-island freight transport. The accessibility and connectivity of the land use can be obtained
from the freight distribution model as a measurement to evaluate different land use scenarios and
also to provide feedback for land
use modeling, as a
parameter for freight location choice. With a freight distribution model to identify freight
commodity supply and demand in a
particular region, potential freight transport generation uses such variables, which
consider generalized transport costs. Using the Furness and Maximum Entropy models, the
results indicate that
Furness model finishes in the 4th iteration and Maximum Entropy in 6th, while the
negative exponential function offers the best calibrated estimation, using sea freight movement data. It was also found that the positive value of β means that any increment of travel time decreased the rate of
freight flow, which mirrored the conditions in reality: the higher travel costs, the fewer the
number of flows between zones. The data is analyzed in the context of modeling intra-city freight flow in the archipelagic region of northern Maluku.

Keywords: Freight distribution; Impedance function; Synthetic model; Transport costrt cost

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