| Title | Innovative Traffic Data QA/QC Procedures and Automating AADT Estimation |
|---|---|
| Record ID | 67969 |
| Personal Name Creator |
Holik, William A.; Tsapakis, Ioannis; Vandervalk, Anita; Turner, Shawn M.; Habermann, John |
| Personal Name Contributor |
Thompson, Stuart |
| Corporate Creator | United States. Department of Transportation. Federal Highway Administration. Office of Safety |
| Corporate Contributor |
Texas Transportation Institute |
| Publisher | United States. Department of Transportation. Federal Highway Administration. Office of Safety |
| Publication Date | 20170301 |
| Language | English |
| Abstract | This case study highlights two noteworthy practices at the Southeast Michigan Council of Governments (SEMCOG) regarding short-duration traffic count validation procedures and an automated annual average daily traffic (AADT) estimation process. SEMCOG maintains a centralized traffic count database and receives traffic counts from the local agencies in southeast Michigan. SEMCOG conducts 46 validity checks on all traffic count data to identify invalid data available in the database but not adequate for analysis. After implementing the system, SEMCOG reduced labor costs associated with converting and entering data and was able to spend more time analyzing data. SEMCOG developed an algorithm that works inside its geographic information system (GIS) to improve AADT estimates by searching for uncounted segments with nearby counted segments. When a counted segment is identified, the algorithm calculates the weighted average of two nearby segments and assigns that AADT to the uncounted segment. This process was automated using Python scripts, which results in an increase in the number of AADT estimates without requiring additional field data collection. |
| Rosap ID | dot:42856 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/42856 |
| TRT Terms | Quality assurance; Quality control; Annual average daily traffic; Traffic data; Data quality |
| Geographical Coverage |
United States |
| Contract Number | DTFH6116D00004 |
| Report Number | FHWA-SA-17-035 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/67000/67900/67969/FHWA-SA-17-035.pdf |
| Format | |
| Database | NTL Digital Repository |