Permanent Traffic Count Site Locations
PennDOT maintains 98 permanent traffic counting devices strategically located throughout the state. These sites collect data on a continuous basis throughout the year. This data is used to develop daily and seasonal factors, as well as to identify changes in traffic patterns. All of the data is reported to the Federal Highway Administration..
There are 15 Weigh-in-Motion (WIM) sites which collect continuous truck weight and vehicle classification data, 45 Continuous Automatic Vehicle Classification (CAVC) sites that collect continuous vehicle classification data, and 38 Automatic Traffic Recorder (ATR) sites that collect traffic volume data. These sites are collecting data 24/7/365.
Additionally, there are 152 inductive loop sites, referred to as Short-Term In-Pavement (STIP) sites installed throughout the state. This type of site is considered a semi-permanent traffic data collection device. The sites are not continuously collecting data.
The location maps of the WIMs, CAVCs, ATRs, and STIPs can be obtained by clicking on one on the links below.