Simon Court

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ACCESSION Measuring transport accessibility with
GIS

• Simon Court
• Basemap Ltd

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Accession Overview

• Developed by Citilabs Ltd and MVA Ltd on behalf
  of UK Department for Transport in 2003
• Basemap Ltd Worldwide Accession resellers,
  support and training on behalf of Citilabs
• Now extensively used in the UK by public sector
  and private sector
• UK Government endorsed
• Software for multi-modal transport accessibility
  analysis
• Most UK councils are using Accession software

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Accession Functionality
Imports UK standard transport data formats -
Public Transport bus/rail/underground/light rail
(UK wide data) - Digital road networks Accessi
bility calculation and reporting - UK Department
for Transport (guidance on accessibility
planning) - Local Accessibility -
Network accessibility PT/Car/Cycle/Walking
- Analysis with census data - Researched and
approved methodologies Full transport data
manipulation - Alter PT data New routes/ edit
routes / suspend - Alter road networks Change
speeds / add new links / suspend
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Different uses for Accession

• Assessment of public transport services
• Local transport plans
• Investigating accessibility to health services
• Investigating social exclusion e.g. access to
  employment
• Analysis of sites (planning applications)
• Business (re)location and catchment analysis

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Key Software Features

• UK data import tools (reads a variety of
  different formats)
• Reads in most standard worldwide mapping formats
• Built in mapping software component
  (import/export from/to GIS)
• Built in accessibility calculators, display and
  reporting tools
• All work stored in MS Access database
• Full access to any imported transport data /
  results files / contours
• Save repositories and share between offices

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Local Accessibility
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Walking Time
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Reporting Tools
Threshold Reports Total numbers or of census
variables that can access destinations within a
certain time e.g. number people within 30 mins
Continuous Reports Complex calculations that take
into account what is at the destinations (e.g.
number shops, retail space etc)