Terrain Model Resolution Effect on Sight Distance on Roads

Authors

  • Maria Castro
    Affiliation
    Universidad Politécnica de Madrid
  • Alvaro Garcia-Espona
    Affiliation
    Universidad Politécnica de Madrid
  • Luis Iglesias
    Affiliation
    Universidad Politécnica de Madrid
https://doi.org/10.3311/PPci.7658

Abstract

Available sight distance is a key factor on road design. This research is focused on the effect of Digital Terrain Model (DTM) resolution on available sight distance. In addition, the effect of distance between calculation points along the vehicle path is also considered. The available sight distance is calculated using a Geographic Information System (GIS). Three high resolution DTMs, based on airborne LiDAR (Light Detection and Ranging), are used. Vehicle path is collected by a Global Navigation Satellite System (GNSS) mounted in a vehicle travelling along the road. Twelve combinations of DTM resolution and distance between calculation points along the vehicle path are studied. Results are statistically analysed and each case study is compared to a reference case which is considered close to reality. The analysis made shows that DTM resolution has a larger effect on the quality of the results than distance between calculation points. Practical issues are discussed.

Keywords:

Available sight distance, Geographic Information System (GIS), Digital Terrain Model (DTM), Global Navigation Satellite System (GNSS), Light Detection and Ranging (LiDAR), traffic safety

Citation data from Crossref and Scopus

Published Online

2015-03-26

How to Cite

Castro, M., Garcia-Espona, A., Iglesias, L. “Terrain Model Resolution Effect on Sight Distance on Roads”, Periodica Polytechnica Civil Engineering, 59(2), pp. 165–172, 2015. https://doi.org/10.3311/PPci.7658

Issue

Section

Research Article