Peter Brett Associates (PBA) is a multi-disciplinary
engineering company with more than 300 staff, primarily based in
the UK but also in offices overseas. With prestigious transport
planning and modelling projects throughout the UK, Helen Bowkett,
Associate, had long been on the lookout for a truly integrated multi-modal
transport planning package to replace the tools currently in use.
When introduced to OmniTRANS in 2004, and after
trying out the Matrix Estimation capabilities on a project in Brinsford,
West Midlands (with help from Goudappel Coffeng) she was quick to
purchase a licence and soon arranged training courses in the UK
for both PBA staff and some external clients.
PBA’s first major project to be done using
OmniTRANS is to build a multi-modal model of East Grinstead for
West Sussex County Council. The objective is to measure the effects
of significant housing development in designated parts of the town
as well as the impact on junctions on the nearby M23 motorway.
The model was created using a Saturn Highway network,
a TRIPS PT Rail network of SE England and zone boundary information
from ArcView. To this was added link count data from multiple sourcesand
local bus serviceswere coded directly into the new model.
"Although a lot of effort went into importing
this data it was very worthwhile” said Helen, "It improved
our understanding of the data and in turn the calibration of the
model. For example, in terms of matrix data constructed from Road
Side Interview Data we were able to handle easily complex and numerous
datasets. By assigning each survey station its own matrix cube we
were able to analyse the data for each site before aggregation into
unified matrices for the study area".
Bus and Rail matrices received similar attention.
Although the study area was extensively surveyed, there were the
inevitable gaps in parts of the town centre where trips had not
been observed. Matrix Estimation synthesised these missing trips.
Minnerva assisted PBA in this project