A Streamlined and Automated Procedure for Identifying No-Passing Zones Using Existing Resources Available to the Nevada Department of Transportation

Computer aided design (CAD) and geographic information systems (GIS) software should make the identification of no-passing zones possible with the click of a button. However, most highways were built before the use of CAD and GIS software was standard practice in highway design. As a result, the identification of highway segments that require no-passing zone markings is often achieved by transportation agencies using the two-vehicle method field procedure. The two-vehicle method is inherently labor intensive and time-consuming, thus the need for streamlined procedures that can be adopted by transportation agencies. The Nevada DOT (NDOT) continuously conducts asset inventory surveys along highways using an instrumented data collection vehicle. An indirect result of the process includes an accurate dataset that describes the path followed by the data collection vehicle. Software that relies on the vehicle path dataset as input to create a model of the corresponding highway geometry was developed. Using the model, the software automates the identification of theoretical line of sight obstructions based on input from the user. Therefore, the software developed provides NDOT with a decision support system that allows identifying highway segments that are candidates for no-passing zones without the need for dedicated and labor-intensive field surveys.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 61p

Subject/Index Terms

Filing Info

  • Accession Number: 01691876
  • Record Type: Publication
  • Report/Paper Numbers: P638-16-803, TOPS-NDOT-07-2018-01
  • Contract Numbers: P638-16-803
  • Created Date: Jan 7 2019 10:53AM