D5 Annex report WP 3: ETIS Database methodology ... - ETIS plus

D5 Annex WP 3: DATABASE METHODOLOGY AND DATABASE USER MANUAL –
FREIGHT TRANSPORT DEMAND
In Annex B for each supporting indicator a template is included in which the method of
calculation and required variables, modelling, model input and other characteristics are
described.
3.3 Variables to be included in WP 3 Freight transport demand
In this section the variables are listed that are needed for the calculation of the supporting
indicators described in section 3.2. Furthermore these variables are selected in such a way that
the database will be flexible enough to cover also future changes to the indicators and to make it
as useful as possible for modelling and forecasting. It should also provide a proper basis for
comparison between modes and sub­markets. For this reason it should be mentioned that the
requirements for the indicators listed have been considered as a minimum requirement and do
not reflect one to one the selected variables to be considered in this work package.
Freight OD matrix
Many of the TEN policy related indicators listed in section 3.2 are directly or indirectly linked
to OD transport flows. For instance information about transport volumes on specific links on the
infrastructure network can be produced by applying an assignment where the assignment
procedure needs as input the freight OD matrix. This also holds for many of the other indicators
such as noise levels or energy consumption. Therefore the freight OD matrix has first priority.
Once the freight OD matrix is available, other information and data can be added to it and
indicators can be derived from it.
It has been chosen to build a region to region (also cross border) transport chain structure in
which change of mode and transhipment location are included. A theoretical analysis on the use
of transport chains is given in annex D and in chapter 4 the methods to be used to construct the
transport chain database are described.
A record structure will be applied with two transhipment locations and three modes (from
experience it appears that a record structure with more transhipment locations is not feasible,
see also annex D). The transport chain matrix will then have the following structure:
· Origin
· Transhipment 1
· Transhipment 2
· Destination
· Mode at origin
· Mode between transhipment points (active mode)
· Mode between transhipment points (passive mode)
· Mode at destination
· Commodity
· Cargo type
· Unitised / non­unitised
12
Document2
27 May 2004