Crash reduction monitoring system

Coding manual, Version 3.0

Print version: Crash reduction monitoring system coding manual (PDF 1.19 MB, 72 pages)

Preface

The purpose of this manual is to provide guidance on completing the crash reduction monitoring system coding forms. The crash reduction monitoring system has been set up by Land Transport New Zealand (Land Transport NZ) to evaluate the effects of safety improvement works.

The crash reduction monitoring system consists of two types of forms, which are to be filled out for each location monitored. These are a crash location form (CL form) and a problem definition and recommendation form (PR form)¹. Data from these forms is entered into the crash analysis system. The monitoring system produces an implementation report form that is used to record progress on implementing the safety improvements.

This is version 3.0 of the Crash Reduction Monitoring System Coding Manual and includes a major reduction in the amount of information recorded about each crash location. The decision to reduce the amount of information recorded has been made for a number of reasons.

• A package of safety improvements is commonly implemented at crash reduction study locations. Each part of the package can affect different crashes to different extents, which makes it very difficult to accurately monitor the effects of individual components. Analysis based on some of the detailed crash location data previously gathered has, therefore, not been possible.
• A considerable amount of time and effort is required by road controlling authorities to obtain the information. The reduction in the amount of information required will simplify the process.

Examples and definitions of information to be recorded are included in this manual so that there will be consistency throughout the country in the information obtained through the use of the forms.

This manual should be used in conjunction with the New Zealand Guide to the Treatment of Crash Locations.

¹ See section 1.2

Contents

Preface

1     Background
       1.1      Purpose
       1.2      Definition of monitoring forms
       1.3      Procedure for monitoring
       1.4      Crash reduction flow chart
       1.5      Monitoring previously studied crash locations
       1.6      Stop monitoring and crash location deletion criteria
       1.7      Monitoring system analysis

2     Crash location form (CL form)
       2.1      ID no (identification number)
       2.2      Study name
       2.3      Study period (years) 10
       2.4      Location name
       2.5      Location number
       2.6      Report date
       2.7      Road type
       2.8      TNZ region
       2.9      Local authority
       2.10    Location type
       2.11    Site specific location type
       2.12    Speed limit
       2.13    Road classification
       2.14    Roadside development
       2.15    Environmental changes/unusual conditions (if necessary)
       2.16    Crash selection method

3     Problem definition and recommendation form (PR form)
       3.1      ID no (identification number)
       3.2      Study name
       3.3      Location name
       3.4      Location number
       3.5      Problem coding
       3.6      Recommendations
       3.7      Linking
       3.8      Implementation
       3.9      Estimated cost of recommendations
       3.10    Total crashes
       3.11    Number of crashes addressed
       3.12    Crash savings
       3.13    Description of addressed crashes

4     Implementation report (IR)
       4.1      Structure of the implementation report

Appendix A   Definitions of keywords and phrases
       A1 - Problem coding sheet
       A2 - Recommendation codes

Appendix B   Examples of forms and reports
       B1 - Crash location (CL) form (blank)
       B2 - Problem recommendation (PR) form (blank)
       B3 - Crash location (CL) form (completed example)
       B4 - Problem recommendation (PR) form (completed example)
       B5 - Implementation report for a monitored location
       B6 - Updated implementation report
       B7 - Updated not done report

Appendix C   Local authority names

Appendix D   Examples of monitoring output
       Output 1: Road safety reports
       Output 2: Crash analysis system
       Output 3: Monitoring system analysis reports

Appendix E   Crash reduction monitoring system quick reference chart

Flow charts
       Crash reduction flow chart
       Location type selection flow chart

Tables
       Table 1 - Monitoring previously studied crash locations

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Page created: 3 August 2005