Traffic Volume Counts
Each data layer used in the interactive map is
listed below with a link to a full metadata ("data about data") page. If the data was
not developed by the MPO, the metadata link points to the data owner's
or distributor's metadata page, and processing prior to inclusion in the
map is noted.
- Traffic count locations (developed by the MPO)
- Major roads (maintained by the Massachusetts
Highway Department and distributed by MassGIS)
This layer was derived by extraction from the "all roads" layer. The arcs were joined with attributes in the road inventory and street name files (see the original metadata page), and then most attributes were dropped and the remaining ones renamed for intelligibility and compatibility with dBase IV limitations. Items were added and computed for total number of lanes and ADT per lane. The second lines for divided highways were removed. Finally, the lines were simplified to reduce the burden on the server.
- All roads (maintained by the Massachusetts
Highway Department and distributed by MassGIS)
The arcs were joined with attributes in the road inventory and street name files (see the original metadata page), and then most attributes were dropped and the remaining ones renamed for intelligibility and compatibility with dBase IV limitations. Items were added and computed for total number of lanes. - Massachusetts towns (developed and
distributed by MassGIS)
At small scales, the lines representing roads were simplified to reduce the burden on the server. - New England state outlines
(maintained by MassGIS)
The lines representing roads were simplified to reduce the burden on the server. - Lakes, ponds, and basins
(maintained by MassGIS)
These traffic count Web pages and data were
last updated in May 2006. The MPO does not warrant the accuracy of the
count data, which was collected by other agencies and is made
available on this Web site with their permission.
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