PEDESTRIAN DELAY ESTIMATION AT SIGNALIZED INTERSECTIONS IN DEVELOPING CITIES

Most pedestrian delay models were developed on the basis of studies conducted in developed countries. This paper proposes a pedestrian delay model suitable for signalized intersections in developing cities, where the traffic conditions are significantly different. The proposed model is based on findings from a field study conducted in Xi'an, China. The field study consisted of two parts: Part I involved only one crosswalk, and the signal cycle was divided into 13 subphases; Part II involved 13 crosswalks, but the signal cycles were only divided into green phases and non-green phases. Findings indicate that: pedestrian arrival rates were not uniform throughout cycles; pedestrians arriving during green phases might also receive delays; pedestrian signal noncompliance was so severe that delays were greatly reduced, but non-complying pedestrians might still receive delays; and for pedestrians walking different directions, though the relationships between average delay and arrival subphase were different, the overall average delays were almost the same. Based on the field study results, some assumptions are made about the relationship between average pedestrian delay and arrival subphase, and a new model is developed to estimate pedestrian delays at signalized intersections. The new model's most significant improvement is the adequate consideration of signal noncompliance during effective red phases. Validation using field data indicates that the new model provides more accurate estimation for Xi'an than previous models.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00986615
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Feb 7 2005 12:00AM