Developing matrices of freight movements using eRUC data

Developing matrices of freight
movements using eRUC data
Tony Brennand
National Transport Planning Manager – NZTA
Alan Kerr
Manager – Southern Transportation, Beca
Presentation structure
Summary of NZTA business drivers
Overview of proof of concept study
─ eRUC Fleet GPS data
─ Defining a trip
─ Matrix development
─ Development of additional functionality
Data confidentiality
Potential enhancements and applications identified
Demonstration of tool
NZTA Business Drivers
Why are we interested in Freight
movements?
─ Efficiency
─ Safety
─ Strategic investment
─ Network performance monitoring
Modelling freight movements
─ 2012 WTSM model update
Identify uses for eRUC data
Proof of concept - background
Beca was commissioned by NZTA to investigate the uses of
various sources of freight data to enhance the understanding
of freight activity across the network.
Study Purpose:
to develop the methodology for evaluating a range of
different aspects of freight movement across the country,
with the Wellington area the focus of the proof of concept
investigations
Specific target to improve understanding of freight activity to
enhance traffic modelling (Wellington Transport Strategy
Model – WTSM)
Proof of concept - Methodology
The proof of concept study has involved three tasks:
Task 1: Data Investigation – a review of data sources
including eRUC and FIGS
Task 2: Data Processing – development of a tool for data
manipulation and extraction of origin-destination matrices
Task 3: Freight Matrix Road Map – analysis of the spatial
and temporal coverage of the EROAD data set in the
Wellington Region
Proof of concept - Methodology
Methodology:
Source Data:
EROAD
Process Raw
Data
Define a Trip
Reporting
Consolidate
Trips
Create Trips
Table
Proof of concept - Findings
Comparison with count data
EROAD March 2012 eRUC data has been compared to HCV
counts available across the NZTA, Wellington City, Hutt City
and Porirua road networks
Overall EROAD data was found to represent 3% of HCV
flows
Comparison with WTSM
Overall EROAD data was found to represent 1.3% of the
current WTSM Matrix
MOU and Data Confidentiality
There is no explicit obligation on EROAD to provide raw data
to NZTA, only to retain data for auditing purposes
EROAD had commercial concerns regarding provision of
disaggregated data to NZTA
Beca has signed a Memorandum of Understanding (MOU)
with EROAD which agrees:
─ The purposes for which the data can be used
─ That data can only be provided to NZTA in a way that does not
identify any specific transport operator or their drivers
Freight Matrix Tool Demonstration
Matrix Outputs
Ebox Enquiries (only visible to Beca)
Single Screen Line: count/time
Dual Screen Lines: count/route/journey time
Potential Enhancements / Applications
Sample bias assessment
Additional data source investigation
Freight projects and strategic investigations
Performance monitoring
─ Travel times/congestion monitoring
─ Travel time reliability
─ Speed assessments
GIS and real time information
Traffic safety analysis
Assessments of seasonality and diurnal variability
Modelling Applications
Origin/Destination matrix development
Route choice/ validation of assignment
Land use trip production/attraction
Speed/flow curve development
Journey time validation