Traffic Information FAQ

Transportation Planning Division


Transportation Planning Division


Traffic Information (FAQs)


Traffic Volume Maps and Traffic Data Reports



  1. What are traffic counts used for?


  1. When is traffic count data collected?

  2. How would I locate traffic counts for a specific location in Pennsylvania?

  3. How do I order Traffic Volume Maps?

  4. Where can I download a map?

  5. What do I do if I have difficulty downloading a map?

  6. What do I do if I get "Page Unavailable" or I do not see updates that were made on the website?

  7. How do I view a PDF file? How do I read a PDF file?

  8. How do I print a portion/section of a PDF map?

  9. What type of Traffic Volume Maps are available?

  10. What do the RED numbers on the Traffic Volume Map mean?


  1. What do the BLACK numbers on the Traffic Volume Map mean?


  1. Why aren’t there any numbers displayed on the map when I enlarge an area?







  1. Traffic information is critical in transportation decision making related to highway funding, traffic engineering, highway design, planning, programming, and air quality analysis.


  1. PennDOT has an established program for collecting traffic data. Traffic data is collected at approximately 30,000 sites statewide. The sites are on various collection cycles: annually, every three or five years, depending on priority of the highway system. 6,000 traffic counts are taken each year at selected locations.


  1. Go to the Traffic Information Page and select iTMS (Internet Traffic Monitoring System. ITMS has seven different search types to choose from to help your search. The information in iTMS is updated weekly. You can also go to the Traffic Volume Map Page and choose the appropriate county. You may then view the map and zoom in.


  1. Please go to the Map Sales Page to view which maps you would like to order.


  1. You may download maps from our Cartography section. Please click on the Cartography Section link to choose a map, and then follow the directions on the screen. All PDF maps can be saved to your machine once they are opened in Adobe Acrobat Reader. When the file is opened in Adobe Acrobat choose "File", "Save As" and save it to a directory on your machine.


  1. All of our maps are on a FTP server. Depending on traffic and server availability these files can take time to download. If you have difficulty please email our BPR WebMaster.
  1. You may be looking at a cached version of the page. Your Internet Explorer options may not be set correctly that is why you are looking at a cached version. To correct this please check your Internet options.

  2. First you must have Adobe Acrobat Reader version 4.0 or higher. If you do not have this you may download it. Once this software is installed, just click on the desired PDF file link and the PDF will be automatically downloaded and opened in Acrobat Reader when the downloading is complete.


  1. Clicking on this document will show you how to print a portion/section of a map.


  1. The most current version of the Statewide Traffic Volume Map and individual County Traffic Volume maps.  The Statewide Traffic Volume map contains major routes: Interstate, US, and PA routes only. The County Traffic Volume maps are more detailed and contain State Routes.
  1. The RED numbers are the State Route numbers. You may also obtain more information on the legend located on the map.


  1. The BLACK numbers represent Annual Average Daily Traffic (AADT). AADT is the typical daily traffic on a road segment for all the days in a week, over a one-year period. You may also obtain more information on the legend located on the map.


  1. You are probably within an enlargement on the main body of the map; the enlargement areas are shaded and identified with an enlargement number. The enlargement areas are displayed off to the side of the main body of the map.