GIS public
transit accessibility analysis
ACCMAP is a travel access
and travel time mapping package. It measures accessibility
to and from any point based on travel costs through
highway and public transit networks.
ACCMAP also provides an index of public transit quality
and level of service.
Built as a Geographical Information System (GIS),
ACCMAP quickly provides an accessibility-mapping overlay
on any background map. It enables easy manipulation
of the representation of the multi-modal transport system
for creating scenarios. The influences these changes
have on the transport system are clearly shown.
ACCMAP is a powerful tool that can be used in a wide
range of transport related studies.
METHODS
Local Accessibility
Local public transit access is represented
as a combination of walk time to a boarding point
and the average wait time for a service. Accessibility
calculations can be based on either straight-line
walk time or actual walk time.
Public Transit Data Display
and manipulation
The stops and routes are displayed in a map-based environment.
A query tool can be used to identify routes running
through stops. A point and click facility allows
the easy addition and deletion of stops. Simple
creation and amendment of route data are achieved through
a user-friendly GIS environment. As part of the
route creation and addition facility, stop timing points
can be entered and stop types can be interpolated to
derive service times.
A contour tool is available for the creation of travel
isochrones. Powerful GIS display and analysis
functionality are available for a variety of display
options such as color shading. Census data can
be compared with accessibility maps and displayed alongside
results.
ACCMAP has been used in a variety of projects in the
UK and elsewhere.
Topics include:
- Reviews of existing public transit services
- Simplified analysis of effects of proposed service
changes
- Plans for meeting disabled persons transport requirements
- Development of business case for retail location
- Site evaluation for property business re-location
- Development of green commuting plans for private and
public sector organizations
- Development of car parking standards based on public
transit accessibility levels
- Analysis of school catchment areas and pupil travel
requirements
Available ACCMAP Versions
ACCMAP
Solus
Does not require any GIS software (i.e. software has
its own GIS functionality). Capable of directly
reading in (no translation process required) ArcView,
MapInfo and GeoMedia files for background mapping
and comparisons. Capable of using TIF raster
files.
ACCMAP Mapinfo
Requires MapInfo V4.1 or later.
