کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
292717 511043 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A case study on multi-lane roundabouts under congestion: Comparing software capacity and delay estimates with field data
ترجمه فارسی عنوان
مطالعه موردی در میدان های چندلاین تحت ازدحام: مقایسه ظرفیت نرم افزار و تخمین تاخیر با داده های میدان
کلمات کلیدی
میدان چند لاین؛ عملکرد میدان؛ ظرفیت؛ تاخیر انداختن؛ طول صف؛ شبیه سازی ترافیک
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی

Existing studies on modern roundabouts performance are mostly based on data from singe lane roundabouts that are not heavily congested. For planners and designers interested in building multilane roundabouts for intersections with potential growth in future traffic, there has been a lack of existing studies with field data that provide reference values in terms of capacity and delay measurements. With the intent of providing such reference values, a case study was conducted by using the East Dowling Road Roundabouts in Anchorage, Alaska, which are currently operating with extensive queues during the evening peak hours. This research used multiple video camcorders to capture vehicle turning movements at the roundabouts as well as the progression of vehicle queues at the roundabout entrance approaches. With these video records, the number of vehicles in the queues can be accurately counted in any single minute during the peak hours. This study shows that unbalanced entrance flow patterns (i.e., one entrance has significant higher flow than others) can intensify the queue and delay for the overall roundabouts. Then various software packages including RODEL, SIDRA and VISSIM were used to estimate several performance measurements, such as capacity, queue length, and delay, compared with the collected field data. With the comparison, it is found that all the three software packages overestimate multi-lane roundabout capacity before calibration. With default parameters, SIDRA and VISSIM tend to underestimate delays and queue lengths for the multi-lane roundabouts under congestion, while RODEL results in higher delay and queue length estimations at most of the entrance approaches.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Traffic and Transportation Engineering (English Edition) - Volume 3, Issue 2, April 2016, Pages 154–165
نویسندگان
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