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.