Enhancing road safety management with geospatial database and GIS mapping
Dr Wei LiuGHD
Enhancing road safety management with geospatial database and GIS mapping
Overview of Presentation
• Background
• Development of Integrated Road Safety Data Management System
• Demonstrations of Potential Applications
• Summary and Conclusions
Background – Data is crucial
• Data is the cornerstone of all road safety activities and is essential for the diagnosis of road crashes and for monitoring road safety efforts.
• Without ongoing, data-led diagnosis and management of the leading road safety problems, it is difficult to achieve significant and sustainable road safety improvements.
Define problems
Identify risk
factors and
priorities
Formulate Strategy
Set targets and monitor performance
Background – Data Use in Safe System
• Safer Journeys, New Zealand’s Road Safety Strategy 2010-20, adopts a safe system approach to road safety focused on creating safe roads, safe speeds, safe vehicles and safe road use.
• This approach represents a fundamental shift in the way we think about road safety, as there is the additional challenge and demand for integrated and effective use of various types of data to achieve our road safety targets
Background – Data Management Issues
• Data Hard to Reach
• Data not in Friendly Format
• Data Rich, Intelligence Poor
Development of Integrated Road Safety Data
Management System• An integrated road safety
data management system, consisting of a road safety database and a mapping tool, has been developed.
• West Waikato State Highway Network
GHD Integrated
Road Safety Data
Management System
CASDetailed Crash
Information
RAMM
Road Safety Studies
Development of Integrated Road Safety Data
Management System• RAMM
• Carriageway Section
• Carriageway Surface
• Signs
• Road Markings
• Skid Resistance
• Out-of-Context Curves
• FWP
• …
Development of Integrated Road Safety Data
Management System• Road Safety Studies
Spatial-Referenced Road Safety Database
• Spatial referenced road safety data
• Spatial queries designed to search within the available road safety related data to satisfy a given geometry condition
• Distance
• Overlap
• Contain
• Tools are available to convert data between a linear referencing system and a spatial referencing system.
Road Safety Data Mapping
• Visualises All Types of Road Safety Data in a Single Platform
• Integrates Different Type of Road Safety Data Spatially
• Friendly and Easy-to-Use Interface
• Take Advantage of Functionalities and Information Layers (such as Streetview) within Google Earth / Map
• Convenient to Share Information with Others
Road Safety Data Mapping
Potential Applications
• Understanding safety risks in the network level
• Gathering information for road safety studies
• Safety improvement project identification and prioritisation – hot spot analysis
Understanding Road Safety Risk
Collecting Information for Road Safety Study
Hot Spot Analysis
Summary and Conclusions
• Effective use of data is a challenge in road safety management under the safe system approach.
• An integrated road safety data management system has been developed by GHD, and has the potential to make the most of data.
• By applying the system , more informed decisions on road safety improvements can be achieved.