Traffic Flow Characteristics of Isolated Off-ramps in Iranian Expressways
Publish Year: 1377
نوع سند: مقاله ژورنالی
زبان: English
View: 176
This Paper With 11 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IJE-11-3_002
تاریخ نمایه سازی: 19 اسفند 1400
Abstract:
The purpose of this study was to investigate traffic flow characteristics at off-ramp junctions in Iranian expressways. The study was conducted on the traffic behavior in isolated off-ramp vicinity of ۶-lane expressways. The database consisted of traffic flow and traffic speed information extracted from videotapes. The relationship between diverging traffic flow in the right lane of expressway with total expressway and ramp flows was investigated. The ۱۹۸۵ U.S. Highway Capacity Manual, the ۱۹۸۵ HCM, models, and numerical values for isolated off-ramp analysis were evaluated and modifications for Iranian expressway system were suggested. The speed -flow relationship study showed that for a developing country such as Iran, the developed country's transportation engineering and planning manuals such as the ۱۹۸۵ HCM could give misleading results. Highway capacity analysis should be adjusted for a developing country's prevailing traffic composition and driver behavior.
Keywords:
Authors
M. Vaziri
Civil Engineering, Sharif University of Technology